I think part of the reason I'm a little nervous is because the original team isn't working on the enhancements. In my experience, it works better when the same team comes back to fix something. I'm most worried about the fact that Scott Towbridge isn't working on it, as he was the main creative of the original incarnation.
The action and timings were perfect as is, and like Teebin, I hope they didn't muck with it too much. All I wanted was HD animation, not new action sequences, and not a new score. I don't want to come off the ride and say "Yeah, the original version was better."
I'll keep my fingers crossed on this one...