Rawr and I are in the same guild. We are in bracket 44 (Ranks 431-440). And I would happily play against a MAB team.
The issue our guild is having is that we are a casual guild. We welcome new players all the time as we remove inactive members (those that haven't logged in over a month). When our new players go up against the developers (who are rocking fully traited teams that also use the event buffs) they get very discouraged and are unlikely to continue playing the game. Multiple times have they said they must not be leveled up enough to play in the GW and they don't try again.
I enjoy seeing just how powerful the teams the developers come up with but it seems to have a negative effect on our guild. I love that the GW have encouraged me to make new teams using the daily mana color. But when we play against the developers you have very little chance of winning unless you have a board control build, in my experience anyway. So, again forced to playing what I know and not trying to make a new team.
This is our 3rd or 4th week going up against the developers. At least they didn't kick us as much this week as they did on the Centaur event week.