I think Arena will run out who he feels has performed the best in practices. And that's saying something obvious that hasn't been the case for a long time. And I think, the players will respond well to the challenge of impressing him. They pretty much all know him well and he's generally well-liked.
I doubt he will care if they are playing domestically or internationally.
I think we have guys who, if played in the right scheme, who show much better than they have in the past. When every player, EVERY PLAYER, looks better for his club, it's a no-brainer will we see individual improvement. As much as the JK apologists will never admit, Bruce can run circles around JK setting up a team and getting guys to flourish in their respective roles........and they'll love doing it for him. Who knows, though. I may be wrong about some of team chemistry. From what I've read, it seems just about every player publicly or not, likes the change.
For as much as many didn't like his taking this role, it was easily the best choice given our options. Hell, my opinion of Gulati went up ten-fold because he really swallowed his pride to get it done. Sure it probably was necessary to save his "job", but it took balls. Big hairy ones. Top dogs don't generally like to admit failure, and that's what he did. Kudos.
What should be going on behind the scenes, is the active search for the next coach with the assist of Arena. He knows his role here and he can be very helpful in this regard. There is nothing wrong with getting strong feelers out there and putting the idea out there to many candidates world-wide. For the same reasons it appealed to JK, it will most definitely appeal to others. The chance to put your stamp on USSoccer. For as much bias as there seems to be against US players internationally, there is equal understanding that its just a matter of time until the US pushes itself into the next echelon of soccer. Not to the level of Brazil-Argentina-Germany, mind you, but solidly in that next level where if they right their stride, they are a danger to make the best very nervous. We were close several years ago, and unlike many, I think we've regressed. But we've regressed with better technical players in the fold. That will change at some point.