first off, i was VERY impressed with Live. There isn't quite anything like it. It was exactly the thing i was looking for.
A couple things i thought of while playing with it for hours straight.
1: The ablilty to disable Time Stretching, and use pitch or sample rate instead to change tempo, but still within the Warp tool, to allow use of its grid and locking features.
2: A render function, to render entire arrangements. Its quicker than just sitting and playing it back.
thats it