I only have a couple concerns about the game at this point, and I'm sure they'll be cleared up before the release.
My first concern is that Link's hat tends to go through his shield when running, a pretty obvious glitch. Watch the dungeon portion of the E3 demo and you'll see what I mean. It happens pretty frequently, too. I'm sure it will be fixed, though.
Also, as many have stated, Link's movement is not completely natural yet. His running is a bit "puppetlike" (even Miyamoto thinks so at this point) and his jumping also looks a bit unnatural. Miyamoto has essentially said that problems with his movement will undoubtedly be cleared up by the release.
Other than that (and maybe a bit of worry about its timeline placement), I have few reservations about
TP. It will be amazing, I have no doubt.