All of Reg only equates to one third of Kronos so there really shouldn't be an issue with a full merge aside from increasing the channels and making Frenzy service work with instance maps to address potential map crowding. The only reason we see is that the merged auction house was recently implemented but it has no additionals fees yet, so it would hit us at the end of v261. This design feels intentional not because of balanced population, but just to milk us when we use the Auction House by hitting us with a Maplepoint tax for import/export fees. Even will all of New Scania and Bera combined, the server would be nowhere near Krono's population so overcapacity is a complete lie just to potentially force reg players to spend real money when they want to buy something at the auction house.
Make sure you're doing your dailies + Monster Park (even more so on reboot) as this is where Nexon puts the majority of the EXP.
The way the game has gone, grinding is something you do in your downtime. While you're doing something else, between quests or bossing, etc.
Nexon could make grind more exciting by bringing social/party play back into it but given how long it's been and Nexon's continued pushing of soloing everything even bossing, this is unlikely.
The game is sadly single player with multiplayer tacked on at this point.
I also forgot to assign Morning Starlight Harvest. The coins and purchases were shared so i worked in Elysium and bought stuff on my Sia in CW. Also forgot to assign points there too so i was leaving mobbing EXP, Monster Park and dailies EXP bonuses on the table.