In the same spirit as losing advantage from height (or maybe modifying it somehow?), would be nice for hide to become an action instead of a bonus action (except for rogues with cunning action :)).
One thing that I really don't consider that important but think would make a massive difference on how the game "feels" would be more fluid jump animations - right now characters don't feel all that graceful when they jump ^^'. Maybe something as simple as toning down the "THONK" sound of jumps a smidge and making the animation a tiny bit quicker (like shaving off a quarter of a second when initiating and ending the jump) ?
Apart from that, I say surprise me. I thought every patch so far was great and ripe with new content for playthroughs, so I trust next patch will be great also.
Oh, yeah, I forgot. Maybe a few bug fixes ? (the most annoying right now are broken ladders and path finding for characters who don't follow) ?
EDIT: One more: make pickpocketing an active diceroll like lockpicking.
