After playing around with them for a bit today, I think I like the new iPad gestures to bring up the dock, launch the app switcher, and switch between apps. I’m not finding it too hard to differentiate between the three different swipe up gestures to get to the dock, app switcher, and homescreen (according to Federico’s review this is something that Apple improved a lot over the course of the betas).
Ironically, even though the main point of the new gestures seems to be to add the “swipe up for the home screen” gesture for a notional home-buttonless iPad, that’s probably the one I’ll use the least. The five finger pinch to get to the home screen is just so ingrained that I doubt I’ll switch to the new gesture (I’m really glad they kept the 5 finger pinch).
My one gripe is I really wish they had kept control center in the app switcher, even if this was in addition to being able to bring it down from the upper left.