Unfortunately my first impression is that these feats are a giant waste of space. Arena fighting style feats were interesting, and some of them were even useful. Nothing jumps out at me as cool from this bunch.
If you're looking for a bonus to a skill and happen to have one of the at-will's these feats impact, and happen to be using the required weapon, I guess there might be a corner case for picking up one of these feats. But otherwise, it just seems like a bunch of overly specific junk.
There are several of these that give you a bonus to damage roll with Furious Smash, and one for Opening Shove. Good luck making use of those feats...
I guess warlords get a new at-will called Inspiring Strike, the name sounds promising.
Rangers get an at-will called Positioning Strike? That's not going to be confusing...
I'm rather disappointed with this playtest article, but I guess it gives me a lot to write to them as feedback.