I wouldn't mind seeing the FX updated, especially if they aren't afraid to take some time to ensure good quality. Filming models are cool because of the detail, and the old VFX did the trick back when the show first aired, but there was only so much they could do with it. Later in the show they used CG, but the quality of it wasn't all that great, though the epic battle scenes would have been impossible using models. As an aside, if they ever redo those scenes, I really hope they put the shields in there like they're supposed to be. It always bothered me to hear the dialog reference shields when the VFX didn't show any, or how the Miranda class ships were taken out so easily.
Anyway, I figure if they could do it for TOS, the other shows could be done, too.