I have to agree with rpvee that the colours do look washed out in these videos. However I am aware that these are only tests thus far anyway so being too critical at this stage is pointless.
There is a sheen to the prequel trilogy that is very irritating, I mean are the floors, walls, ships, droids, faces, haircuts (did I miss anything?) polished around the clock? In my opinion this seems to be due to the overuse of green screen and CG effects for backgrounds rather than using actual sets. You can see this difference between TPM (more use of actual sets) and AOTC / ROTS (heavy use of green screen). Phantom had its flaws, like the others, but I think it portrayed the universe, stylistically speaking, in a more convincing way.
Getting to the point...I think changing the visuals to closer match the original trilogy is a good idea but I'm not sure if it will be all that convincing in the long run. I hope Bob can prove otherwise of course.
The crux of the matter is that ultimately its Bobs choice and what he decides to do in the end is gospel.