If they want to retain and keep players the dimension dungeon needs to be priority. Along with more PvP balance and rework.
PvP balance so far needs to be nerf tactician, nerf towershields, buff human attributes (maybe), nerf ogh beer belly to be +25 potion utilization instead of drinking more pots. Maybe some other stuff later too.
Current Magic schools need a rework before we should be getting more schools.
Ecu is mostly fine, Spritism is boring AF with one usefull spell (projectile), Necro is meh with ritualism being very lacking, and ele has just some very OP spells like shock.
I would say Necro rework first, think about how to make spritism FUN, and then balance out some ele spells.
Magic already does too much damage so dont go buffing magic.
I would like my weightless shields back for mages please. Not tower shields.