I think I have to agree with you on both counts. Summit really is a rush, they really did well with the music. Other than Summit, I've been thinking and I actually quite like the hotel. I know it's apparently a difficulty spike, but it felt rewarding and the gimmicks didn't feel that gimmicky.
I've not played all of Strawberry Jam yet, but I think Paint will be hard to beat. The art is gorgeous, and the level's story feels like something that would be in the base game.