Remove the jank in combat. The game has awful input lag, along with the terrible and jank combat movement.
The camera is really, really bad, specially against giant enemies.
Balance the difficulty. It's simply NOT FUN dying from two or three hits, it's not fun or fair, regardless of what try-hards and hardcore fans say, when it takes so long for you to kill a boss, making a mistake and dying is not fair or fun.
Stop making boss incompatible with your gameplay: some of the bosses are simply not made for Souls-like movement and are a better fit for either Bloodborne or Sekiro. ER characters are slow and move like molasses. Way too fast bosses are simply not balanced and are a bad fit for this game.
Also, don't make bosses that have infinite strings of combo, neither that keep running around from your attacks, this sucks af for melee characters.
Make respec easier, stop charging items for it, charge exp instead if you must.
Make the mechanics less dumb and more intuitive.
Make the side quests make actual sense and easier to follow.
All of this coming from a person that played all of the games. ER is the most unfun of them by a mile.