Having finally had a chance to play the Mists of Pandaria beta, I'll be looking this week at the basics of the experience for a level 85 death knight coming into Jade Forest, the first zone in the leveling experience.
Upon logging in to Mists of Pandaria for the first time, you will, of course, have to choose new talents. With the talent system being so radically changed, there's really no around it. Luckily, it's a relatively painless process. Having played around a bit with most of the choices, I'm not sure if many of the choices are that dynamic, but your mileage may vary.
On tier 1, you may see some blood death knights going for Unholy Blight to have a nice bit of runic power AoE, but other than that, the three choices are pretty clearly split between the three specs. That said, it's not a horrible tree, either. You can pick some cool stuff that'll help with your desired role and keep on playing, and I like that. It's just not going to be a free choice, per se. At the moment, it just appears that there's almost always a clear winner for most situations on any given tier based on your preferred spec, role, and playstyle.