Only Rogues should be able to Hide as a bonus action to begin with, same as with Disengage. Everyone else are meant to have to use a full action on those things. Together with Expertise not being in the game and Sneak Attack being a declared ability rather than automatic, the Rogues really are hobbled.
That aside, the simplest fix is probably for the game to treat the thing indicating our last known position as a homing beacon for nearby enemies, including that they might throw Alchemist Fire and such items up there for safety.
That would definitely help it after they readjust things to being how they should be, cause then you would have to move from that position and that would run the risk of being seen, and if you stay in that position you run the risk of being hit by an aoe intended to catch you.
