A lot of 'what ifs' in there.
You can never erase the history of the club, as that is there for the record books. In that history however, the club has change its kit many many times, before settling on claret and blue.
If Red Bull came in to buy the club, changed the name of the ground, sponsored the shirts, gave us the Red Bull 'uniform' for the away kit I'd be okay with it. Living in the UAE, I can tell you that the Man City profile over here is massive, yet they're still Man City. They are sponsored by Etihad and play at the Etihad, but they're still Man City. Etihad even means "United", but no one gives a shit, lol.
Aston Villa FC playing at the Red Bull Villa Park, owned and sponsored by Red Bull, competing for champions league football would be progressive evolution of the club for me.
I count one 'what if'
The kit has been claret and blue since 1887!
And then you agreed that a few changes would be acceptable but nothing major, in exchange for Champions League, which is arguably a fair deal.