Hatch Change
I'm mostly happy about the change to how The Hatch spawns, but I don't like how the current plan will cheapen all of the current "Were Did They Go?" achievements.
I like having to work for some of the achievements, and this one is a fun one to work for. Just the right amount of challenging if you've got a good team or a good bit of luck.
The change I've always wanted for The Hatch spawn is just to remove the generator math, make it "Five gens done OR one Survivor left". This would still prevent three Survivors from getting out of a sticky three-gen set up while not having to change the achievement and making it more of a risk for End Game builds to be aware of a Key.
I'm probably in the minority on this one, but even as a Killer Main I never wanted The Hatch to just be for one, and only one, Survivor per Trial.