UngeheuerLich
Legend
Yes, the aura could have been made an automatic feature, but it makes sense that it is a minor action to activate:Indeed, all of the stuff previously that is based around MBA (feats, items etc) were made with the fact that MBA are not the core of a class, they are mainly for bonus attacks that don't happen every round.
Another thing about the stances (as well as the dazed thing) is that both the stance and mark aura are minor actions to activate. In a lot of combats you will need 2 rounds to turn them both on if you want to do something meaningful in the first round.
I'm with Aegri earlier - this doesn't look any more simpler than the basic fighter, in fact it may even be slightly more complicated once all the other class powers come out.
when you charge in, a normal fighter also has to rely on his base attacks. Also I still guess the aura is the fighters secondary mark mechanic, not the first one. The other could still come with a strike of his weapon. It actuallycould have been worse, that you have to use a move action to maintain the defensive stance or something. I guess, it is ok like it is.