D&D Next has been a bit of a mess.
If you don't constantly follow it, they are on like the 5th playtest packet. It hasn't been "A fundamentally sound game with 4 revisions" though, it has been 5 different attempts to toss stuff at the wall to see what sticks. At least 3 of these packets have been crap, you would literally have to bribe me to play the game they we showing. The other two versions look like they had some promise and may be worth checking out, but still very little that really looks innovative of that I'd consider "well designed".
They are convinced going back to 3.x or before designs, no matter how proven bad they were, have to be seriously considered and all 4e concepts, no matter how well designed, should be avoided if at all possible. This has proven a bit hilarious as each version has inevitably had more and more 4e seep into D&D Next as they run into horrific design flaws that are from old 3e (and earlier) versions that were addressed with 4e. Which in and of itself is a bit terrifying, the idea that Wizards through such a big project into the hands of designers who seem to have disregarded a whole edition and a half of lessons and are only slowly coming around thinking "fuck, there was a reason for this shit!".
Oh well. Wizards basicly told thier D&D customers to fuck themselves a few times now and done everything to turn me away from D&D Next so far, so fuck 'em.
Warhammer Fantasy Roleplaying and A Song of Fire and Ice are both better games anyways.