For me, it really isn't the look, though I would've went in a different direction. It is the fact that the world has changed. The writers have different life experiences, the way shows are made are different, the way actors work are different, our understanding of the universe is different, society is different.
What I watched last night "felt" nothing like the 2250's/60's as presented in the original.
It would be like making a modern prequel to Perry Mason. Sure you might be able to not conflict with later episodes on a purely information level. But seeing them walking around with technology no one could have imagined would shatter the illusion. Not only that but the changes in society that a modern show would reflect would also shatter the illusion.
Everyone's mileage will vary.
Of course! Like I said, if it makes you feel better believing its a reboot, cool! We have our reasons for suggesting what we do. I can absolutely respect your viewpoint even if I might not share it.
I was pointing out two reasons, which I find ridiculous to get upset over, which I see a lot of here and elsewhere.