Another good batch of responses!
@Ihateurmom: I completely missed that -- good call.
@Dodgeyou: My 10's been in my sig for a couple of months. Credit to you for doing the chardev. Yes, you do lose some of your secondary stats (and I'm surprised you only lose 17% dodge -- I expected that to be 22% as well), but the stat loss is not the point. Rather, the point is you stay competitive against the high end of the bracket. If ganking untwinked 19s and showing off high secondary stats is your goal, then bracket shifts don't affect you at all. You can stay 10 and retain both of those features, and make a fresh 11. But let's be honest, you could mop the floor with 19s even if you went to 11. Add two stendel's rings to that 11 chardev and see how you feel, as that should bring you back within striking distance of the crit you had before.
@Wafflecakes: The 60s bracket is a strange case, as that bracket really wasn't a twink bracket like the others. To overgeneralize, it was more of a casual PvP bracket as part of the whole Vanilla experience, and the arrival of more serious twinkers from other brackets caused the consternation. Going back to 60 wouldn't reverse that, but it wouldn't need to. Having the options to use raid gear or TBC gear would still encourage the bracket to evolve.
@Tinkerton: I don't see how a bracket shift would cause a stomp from above for any bracket. I think you're spot on when you say that the only real reason to do a bracket shift is to get more pops, and i think the new equilibrium from the brackets would do exactly that. Right now, people avoid certain brackets precisely because stomps from below or above discourage participation. That said, you're right -- there are other changes in WoW I'd prioritize above bracket shifting.
@Pwnadin: Ain't that the truth. Losing the 29 and 39 brackets hurt this game. If we ever lost 49s, my game time would seriously drop.
I should write an article about the potential of the 10-14 bracket. While the community can get a little self-righteous at times (what twinker community doesn't?) I think people really dismiss the potential of the bracket. Consider that two years ago, we didn't have specs that automatically gave us baseline abilities, and we didn't have BoAs. As I understand it, 19s reached their prime the year before the no-XP patch. Today, the 10-14 bracket gets a fair number of abilities, and certainly more talents than 19s did in their prime, plus 10-14 gets access to the whole bracket! Rarely do you see anyone below 19 in the 15-19 bracket.
A lot of players like to rebuff the idea by saying, "Oh gee, a whole two buttons! Sounds...awful!" Besides the fact that there really are more than two buttons' worth of things to do, the narrow scope of abilities concentrates game focus on timing and coordination. In the XP-off games I experienced in the 10-14 bracket, I think players would have a lot of fun in there.