The Disengage/Jump thing is weird and since goblins can disengage without jumping it's not like they need the jump for the disengage to work. I would much rather see these two disentangled, ideally with a jump costing movement only.
I do like the fact that disengage as a bonus action creates more mobility in combat, but as dreambled says, this makes Sentinel mandatory for tanks, assuming the feat actually makes it into the game.
