My primary concern is more about new players, really.
I've been trying to gear up my hunter in Arenas/PvP and it's -really- slow going. First of all, it's all the same content the entire time. That may work for Team Fortress Two or Counter Strike, where it's actually enjoyable to play the same map over and over again, but it doesn't work as well in the World of Warcraft. Second of all, it really sucks to constantly lose over and over again (in both arenas and around BG objectives) simply because they're in way better gear.
So basically, you're doing the same content over and over again and you're losing over and over again.
There's some consolation, at least, in Alterac Valley, where it's really easy for me (as a hunter) to top or get close to topping the Damage Meters. There is some fun there. But other than that, it just gets harder and harder to break into the PvP scene with every new season.
Of course, Wrath of the Lich King will reset all of that, but it may be something they keep an eye out for.
