This sounds great to me. I'm glad they are addressing the "standard combat maneuver" debate by folding the fighter maneuvers into their standard attack. It's the the solution I have been anticipating, it should play out smoothly, and I feel it correlates to the rogue's cunning action in a way.
Action economy, such as it is, is one of the most defining aspects of d&d next classes. In my opinion, what a class does in addition to attacking sets its mechanical flavor right now. I'm a big fan of cunning action for that reason: it allows the rogue to be rogue-līke by giving the player a mechanic that allows for careful positioning each round, setting up for that sneak attack.
It sounds like the maneuvers will be similar, allowing the battlemaster fighter to 'dominate' the battlefield, not only with continuous damage output, but with control/buff effects at the same time.
I just hope that the battlemaster is allowed enough superiority dice to use several in an encounter without running out. If they keep the mechanics that warrior fighters get enhanced crits, I think that battlemasters need a lot of staying power to keep up with them. Passive crit range is quite strong.
My last thought is regarding maneuver feats. Again. I hope the battlemaster gets enough dice on its own so its not forced into these feats. On the other hand, i'm excited that the feature will be available for other classes. It will contribute a lot to allows diverse character concepts and is a nice "dabbling" option alongside multiclassing.