Generations doesn’t have anything that comes close to Jungle Joyride. You may not like it, but that level is what peak Boost level design looks like.
The gameplay as a whole is dumbed down. The drift has absolutely no learning curve (you don’t even need to be in a curve to use it). Lightspeed dash and wall jump are only used when the game wants it, and with warning signs to show us what needs to be done (hate the glowing metal walls). QTEs replaced with “tricks”. No bonus path when boosting through certain ramps (this is showed very clearly in the Unleashed Project). No spinning kick and crouch. Less types of enemies and damage. No exploration whatsoever. And the levels are simple too short and easy.
Oh, I almost forgot the downgraded graphics and story. And 75% of the game is 2D.
And could go on and on, but I think you get my point.