I think it's going to be more difficult to get a good level built in LBP2 than in 1, considering how previous tools were revamped and there are a lot more new tools at your disposal. To add to that, there are levels imported from the beta, so a lot of people will probably be playing those for now.
I have to say, though, that the story mode in LBP2 is infinitely better than LBP1's. The amount of diversity in the levels is damn good, and Media Molecule really shows off what some of the things you can do with the creation mode. I think Acing all the levels will be quite difficult in this one, but none of them seem to be like The Bunker in the first game.