I personally love W2Z2 and have none of the issues mentioned. The trampolines do work fairly reliably if you jump on them. Enough for regular mode. Haven't done trib mode, however. Not sure if they're different. Bauble collection does not require backtrack or baby-mode. If you go all the way to the hand temple but don't trigger the check point, then die and go back and take the shortcut, you can jump from the seven bauble pillars, across the check point (don't trigger it) to get the assassins in the clouds, then jump to doom. That will take you back to the checkpoint right before the ports to all the ninja stops. From there you can get all the way back to the assassin temple. The ONLY problem I have with doing that and the assassin cleanout is the stupid assassin on top of that one pillar right at the beginning. (before the first octopus) I can't find any way to get him other than from the baby rainbow. I think I've tried to slingshot him from every possible platform, but nothing reaches him. Unless someone knows how to get him, that is the ONE thing I wish Anet would absolutely fix, because that does require the baby mode, which I also find really annoying.