I absolutely love the amount of new things in Tooie. New eggs (
Grenade and Clockwork), new shoes, more items, more creative transformations, better mini-games, playable Mumbo, interconnected levels, split up, egg aiming (probably my favorite and
way overdue), good secrets (double speed!), area bosses, room labels, convenient warp points and goddamn Talon Torpedo.
The only addition I don't care for is first person, but it's rarely used and mostly optional, so I don't mind.
It was really nice of 'em to bring back every single move from BK, too.
To be honest I think Tooie is one of the most "complete" direct sequels ever. I agree that some Jiggies are borderline chore, but hey, 70 out of 90. Leave Canary Mary alone and please the thirsty dinosaur instead!