While we're still working on our LittleBigPlanet 2 impressions, have a look at the classic first-person shooter Wolfenstein 3D as it's been recreated in LBP2 by someone playing the beta. Surely, this proves LBP2's editing tools are flexible.
For reference... this is the real Wolfenstein 3D. And this is what LittleBigPlanet 2 looks like before its users start making their own levels.
LittleBigPlanet™2 - Beta: Sackenstein 3D by RAPHAEL [YouTube - Thanks ibro911!]