Last week, we covered fury; this week, we're moving to protection. Before I do, yes, I saw the most recent beta patches. This is what we have to expect and to some degree endure from the beta, continuous patch cycles that can follow hard upon each other. All we can do is wait for release, ultimately, and see where we stand then. The Vengeance changes will have an effect on several abilities including our scaling ones like Shield Barrier, but that doesn't really change their intended use, which is what this post will be covering.
Protection is the warrior tanking spec. Of the three warrior specs, it's the most "ready to go" spec in terms of how it feels to play on the beta right now, and I suspect it will launch with patch 5.0.4 feeling pretty good to most warrior tanks. It's not completely unchanged -- far from it, in fact, as rage for protection warriors has been fundamentally altered and new abilities have been introduced -- but warrior tanks in Mists of Pandaria will still be charging in combat, still using Heroic Leap to drop a huge burst of threat on certain pulls, still pinballing with Intervene and still slapping bleeds on multiple targets with their AoE. Some of it will even be easier now.
A lot of the stuff that's changed is under the hood change, stuff that will affect the game fundamentally but not in immediately obvious ways.