I really liked TRON: Legacy, but it's got one minor flaw.
Realistically it mostly covers the same scenarios as the original, but I don't think that hurts it, because they made a lot of new stuff where it feels way higher quality than the original.
Where it let me down is the big opportunity missed. The new "species" or "race" or whatever you want to call it that Quorra was part of, was only very briefly mentioned and not really shown outside of her. They could have done a lot more to establish it and grounded the whole movie into something that was beyond the re-hashing of the original scenes.
I liken this to what happened in the movie "Jaws". Some people working on Jaws, can't recall if it was Spielberg himself, stated that the scene where they're discussing old wounds and Quinn goes over his horrifying ordeal with the sinking of the U.S.S. Indianapolis, helped to give Quinn a proper revenge arc and helped the movie become more than just a monster movie.