The familiar thing is to improve the system and make it more interesting with extra line options, which is also shared across all worlds so it doesn't change anything for heroic. As long as you add in Glowing Cards and Bright Cards into the game then you make familiars function the same as cubing, improving the system while also simplifying the dumbest system from their current form.
The whole point of Reboot/Heroic was to eliminate trade and access to cash shop items and focus on self progress. It has nothing to do with eliminating scrolls and bpots to simplify the experience. Because cubes are obtained with meso and not NX and meso there is more abundant, it makes the server more appealing than buying cubes in regular servers.
Using familiars to increase someone's range is a poor decision. People only really use it to increase boss damage, bypass healing restrictions or increase drop rates of bosses and farming. No one wants to walk around with since they are a visual distraction (unless you want a parade following you) and the stats provided are temporary as you need to constantly refill them. And in some cases, familiars break classes such as Dual Blade's Mirror Target effect by making the boss target YOU and your familiars instead of the dummy meant to draw aggro. Not to mention, familiars offer only 6 lines of potentials which are actually weaker than main potential and bonus potential where as bonus potential pretty much doubles the amount of lines you can have. Even if familiars made up the loss damage, it would ruin a lot of farming setups since now you don't have access to Drop% for farming.
I doubt the team for GMS wants to overhaul the familiar system just to avoid implementing a system from regular servers into Reboot. Why would the developers pour more time reinventing the familiar system when the KMS bonus potential system already matches your idea of introducing glowing and bright cards for familiars?
If we deviated from bpots and went with familiars being an overseas feature, when KMS does any changes that relates to potentials, familiars would most likely not be included and would be updated late or just be forgotten. If Reboot were to receive Bonus Potentials, and changes made to potentials in KMS would be updated in a timely manner and would cost less man hours as they don't need to rewrite familiar code and just copy bonus potential changes.
The FD buff from Reboot would never be good as bonus potentials since it doesn't provide other stats such as stat, or CDR for classes that greatly benefit from CDR. Sacrificing the FD buff would be a better solution as it gives access to other options that increases your overall damage instead of only impacting only your damage. The main reason no one likes Bpot in regular is because rolling for anything more than 1 line is difficult because there is no way to pick before and after results nor or there Violet, Equality or Uni equivalent versions of bpots. So every roll is pretty much the same as throwing a Glowing Cube. If you rolled 1L att bpot and want to go to 2L att, you would have to lose the ATT line and keep rolling until you find 2L ATT. The risk increases as some whales only settle for perfect 3L bpots, or 6L items overall.
The reason potentials are "easier" to perfect is because Reboot constantly has a supply to Bright Cubes (as long they boss and grind) which allow them to decide which result they want so they never degrade an item unless they choose something wrong. This allows someone to go to 2L to 3L or for the min maxes, go from 33% stat/att to 36% on all their items without fear of worsening items. In our version of Dreamer or GO WEST, we opted to keep cash and in game cubes., but we missed out on a small benefit provided by KMS's meso potential system. All rolls (both Mpot and Bpot) allowed us to compare and keep which results we wanted allowing 6L items to be obtainable without fear or worsening your item. My guess we opted to keep our version of cubes and potentials because we didn't want to receive the meso farming cap that came with it or lose our cash and ingame cubes. I think Reboot or whatever it might turn into should have bpots in exchange for FD assuming they could be re rolled with mesos and have the choice of keeping their results without any further changes to other cubes or meso cap.
We are getting Grandis Familiars in a week along with more hexa skills and Sol Janus? He also they are testing the servers to see if they prepare for a merge or reintroduce Frenzy.
The only thing I wonder is what voice would the character use if they are genderless if they were in cutscenes or using skills. Also what gender would Mastema (Demon Slayer/Avenger's Cat) be? Masterma is normally opposite the gender of the character for the sake of the story. Would be interesting.
The other thing to do is improve the new player experience like making the 1-200 areas and the leveling process more enjoyable,
The road from 1-200 is fast as the stuff the game provides you (0-100 Event Followed up with Tera Blink that both give free equips as Burning events.)
I rather see them implement new fun things to do, new classes, and improve the gameplay experience of existing classes than develop things that will never change or improve anyone's experience.
It takes a lot of time and resources to develop a new class as they need to animate new skills, come up with lore and inspiration, come up the side characters etc. Class rebalances and remasters are another difficult thing and requires the team to deeply understand what is wrong with the current class and how they can improve on it without making the class suck or angry the player base with poor graphics or ruined mechanics (looking at the recent revamps that went wrong in Destiny, Ignition, Angelic Buster as well as Aran and Eunwol.)
Back in 2016, 5th Job was new and had a lot of flaws. Some major ones was it took forever to get the desired trinode you wanted because it was possible to get trinodes of other classes. If you are looking for are Blaze Wizard looking for Orbital Flame, GOOD LUCK. You would find other nodes such as Dark Knight's Dark Impale or Kaiser's Giga Wave. It was a major QoL when they announced that you can only get trinodes for your class instead of all the classes. We went to looking praying you find your own class and primary skill out of all the characters to finding the right skill within your own class. Eventually we were able to choose what primary boost we wanted for our boost nodes and soon we will have control over the entire node essentially removing all RNG. Although this change was drastic and greatly reduces the farming needed to perfect a matrix (the devs might had wanted to grinded it more from the beginning) but this is beneficial change.
2. None of this actually benefits the user's experience, and some of it harms it with information overload which MapleStory is already a very complex game with a lot of systems as is. If anything, we need less systems and not keep adding on more systems.
The changes I am suggesting don't change how much is needed to farm or difficulty it is to progress through randomness, it just makes it easier to spot items in the inventory you can enhance instead of looking for an item that can be enhanced. Rummage and the ability to check the stats and inventories of characters you aren't on makes it easier to find things and work on other characters instead of visiting 50 characters. These changes will help anyone that enhances any items or visits their alts within their accounts.