I've been privy to the D&D Next playtest notes for a few months now, but since they're public, I can say finally what my ongoing impression of the new rules is:
D&D Next reads like somebody's campaign house rules that they've been assembling over the past few decades, cherry-picking from each edition things they like and discarding what they don't. That doesn't make it a bad thing, but you may already be playing D&D Next and not know it. Only time will tell whether the customer base wants to play the "official" house rules or not.
In the meanwhile, don't forget to playtest my new game once the "new car smell" of D&D Next wears off.