A giant * on my impressions is that I've only really played Leon's campaign and some of the Chris campaign.
Fair enough!
I'm getting the impression that RE6 draws from so many things. Whether it all comes together as a creative and original package is still up in the air for me.
To me, Revelations is a game I would consider to have been created by a team with a fair amount of creativity at the helm. I just replayed through it yesterday and today. It responds to many of the criticisms RE5 received, such as being able to move without shooting and having more horror elements, but it didn't go overboard in trying to meet oft-quoted expectations. It kept the bare minimum of RE4's gameplay with a few needed twists, like dodging. For me, it had the right balance of story, gameplay and visuals in a handheld package.
But who knows -- every RE has something special about it (except maybe Zero, although there are things about that one I like too), and I'm sure RE6 will be no exception.