Remove the UI where the Maple Admin NPC appears at the bottom right of the screen as it's not only not very helpful, but also drops frame rates the moment she appears. It's also terrible for burning characters because she would tell you "You've logged into a burning character" everytime you changed channels. ToTs is already around so why not add these "lessons" to ToT's quests instead of making it it's own thing?
Critical is a non issue for Phantoms in both KMS and GMS, as there are so many ways to obtain 100% critical chance without proc%-ing this card, making this buff obsolete. (judgement draw as a whole is practically obsolete as the cards get drawn so fast but isn't worth doing manually if we're going for max damage output)
My opinions for a replacement buff:
Sharp Sword Card:10% critical damage - can't get enough of it.
Illusion Card: Spawns a super weak shadow partner to do 5% final damage (double line)
Reset Card: activates judgement draw again but gives no buff (activates the 10 line carte noire effect)
All for One card: Gives the other 3 buffs (drain, drop and endurance card) at the same time.
All nodes either have a +1 enemy hit or +5% crit rate + 20% monster ignore milestone passive for when a node reaches skill level 20 and 40. Some of these passives are entirely useless for a class (let's say Mihile) who has an enrage buff that adds another target hit to their assault skill which already hits 2 mobs for some reason. If they hit 3 mobs but still 1 mob when enraged then the passive is totally useless.
So my suggestion is to give unique passives to each enhancement core milestone so that each class has it's own uniqueness when they reach certain levels on those nodes.
Example: If Blast is level 20 and currently gives +1 enemy hit, let's try to make something better as a passive like increasing max elemental charge stacks from 5 to 6. This does more good than increasing the max mob count on a bossing skill and allows the class to benefit more than just from fighting a boss who has more than 2 body parts. I know it doesn't make sense for blast to increase max charge stacks but I'm just making an example. A real example would be to auto use Panic when attacking every 30 seconds with 0 delay and no combo consumption on a hero who has level 40 Panic enhancement node
Also: Try giving the least desired skills the best passives, as that would encourage people to actually try to max out those nodes.
IDK WHY nexon uses the bow attack animation when marksman uses skills like Explosive Bolt, Snipe, and Piercing arrow, when they use a heckin xbow. It makes attacking with Ayame's gun cash equip look so derpy when I attack with those skills.