So far I'm seeing an edition that looks like. 3e with less grid and more sanded off edges. As far as I can tell, inoffensive, but still clearly D&D is what they were going for.
But they also wanted the rules to be smooth, easy to adjudicate, and internally consistent.
How did they do on that? What is the Grappling, the Double-Haste, the Thief, of D&D Next?