I believe drinking potion should be a full action as well hehe. There is also perk unique to rogues that later down the line allows rogues to use items as bonus action. Larian is heavily damaging uniqueness of classes - not a surprise as they preferred somewhat classless system for D:OS2.

Doesn’t changing weapons take an action? I am pretty sure it did in my recent playthrough - or is it just picking up weapons after getting disarmed?

I didn’t find potions too offending, but shove is too powerful. I think I wouldn’t mind it as much if it was much weaker giving chance to disengage from one character, rather then instant kill chance.