I just don't see the need for it. I think most of it holds up quite well.
Eh...if you were around for the original run, I guess the argument can be made. But look at the difference between the original and Remastered:
The Naked Time, original. Broadcast September 29, 1966
The Naked Time, remastered. Broadcast September 30, 2006
And for comparison's sake, here's a shot from early TNG:
Home Soil. Broadcast February 22, 1988