Like you I have been mulling over all the Cataclysm beta changes. The most interesting of them being the new 31 point talents trees. I can honestly say so far I am excited about some changes and disappointed with others. I realize this is beta and many things can and will change.
I'm reserving a more detailed look into all the changes to a later post and date. When more of the changes have been settled on by Blizzard. As you can see Blizz has certainly made it clear they want us to really "make a choice" on one talent over another.
For now here is a DK tank build or 3 for you to "mull" over in your spare time.
As always thanks for reading.