Nah. Why remake it? It is what it is. And there's no reason to believe it wouldn't look amazing in HD. The animation -- the movement of the characters, or lack thereof -- was certainly terrible. But the actual hand-drawn elements aren't bad.
If you can, check out Disney's "Sleeping Beauty" on blu-ray. The star of that show are the background elements. The detail in those backgrounds is astonishing. Even better is the sense of depth you get that you don't get in standard def. Whether you'd get a comprable sense of depth with TAS on blu-ray, I don't know. But I'd like to find out.