I think that's by design.
I like that changing weapons, and disengage, is bonus actions for everyone. It just speeds up the game.
Hide on the other hand is a very specific skill, that would be better off as a cunning action.
I think a Thief can be fun though. Thief gaining an extra bonus action actually makes up for cunning action being nerfed.
All in all though the Rogue translated from paper to videogame very poorly, and needs some tender love and care.
