The black box is ridiculously strong, what with the soldier getting 15 hp so long as he damages something somehow (with a bazooka-type weapon no less). I really cannot imagine using the standard rocket launcher if you have the black box. I've also seen the battalion's backup make enemy uber assaults very, very weak. The soldier has definitely been upgraded several levels here.
I hate, hate, hate the eternal reward. Because I get pwned by it constantly from the no-sound super ultra stealth spies...
Sydney sleeper is, as mentioned, crazy strong. Bodyshot + jarate for 8 seconds will ruin a lot of people. What's the general first reaction to when you get jarated? Frigging run away! Now imagine that happening, constantly... In the same vein, the bushwacka will easily turn groups of enemies into mush. I'd be constantly running INTO enemies as a sniper if I had it.
I think pyro got the short end of the stick again, but it's not that big of a deal. His entire set doesn't seem to make much sense combined with each other for the speed bonus and increased damage recieved. I mean, his new weapon makes puff and sting amazing, but he doesn't get to use the axetinguisher in his set...
All of the scouts new stuff turn him into some crazy monster thing. The shortstop is really up there in terms of damage dealing and annoyance. That with the healing milk and FISH... and then an extra 25 hp... it lead to me getting my ass handed to me by scouts constantly.