I'd like to defend the fight for a small second, and the fighter only getting AoO off the bat.
We don't know what else is going to happen. The monk may get AoO off the bat, but he can only make trip attempts, so it is called something else. The rogue can take advantage of fumbles and get an attack off with that. AoO may be more limited with what classes can do with them. A Barbarian, the spell sunder-er anti-magic master, may know how to get AoO better on mages but not movement.
Every class is getting a reaction, so it isn't like Fighters get to do this and the Palaidn just has to sit and do nothing off his turn.
While I totally agree with you, I can also understand that some people may be concerned.
I like the fact that every class is made different in what it can or can't do by default. Others who don't like the class system at all would probably rather have similar basic options for everyone, and even if they can close the gap with a feat they view that as an unneeded tax.