I wonder if all the changes will be to secondary weapons (since the medigun is technically secondary) or if they'll just be to a class's defining feature (since healing/ubering is obviously the main difference between medics and everyone else). I just wonder what they'll do with classes like the heavy, aside from possibly giving him a lighter, weaker minigun that doesn't take as long to spin up/doesn't slow him down as much while spinning, but does less damage or has way less ammo (or even has to be reloaded).
I mean, I could see different, easy to balance new secondary weapons for a lot of classes, but some of their primaries/defining weapons would be hard to offer some modified form of.
I think I'm more excited about the return of the escort mode, though... especially since they've done the right thing (with goldrush, anyway) and made the thing you escort into an invulnerable item instead of someone that can be killed, like the VIP in TFC.