There are things that just need to be changed. Lightning really isn't an important change, but it should look more like lightning.

I don't know why we have even been talking about this so long.

or any of the "realistic" CG,

I know that the PT looks stupid now due to way to much CG, but alot of it looks pretty good. At least better that some effects in ROTJ. I wan't these movies to feel brand new with nice effects not dark and dull visuals.

I'd take a space battle that looks like the ROTS one than the ROTJ one any day.