You could bring back the old AV

You could bring back the old AV by simply removing it from the random battleground queue and making a queue system solely for AV. Or you could keep the current fast version in the random BG queue, and bring back the old version as a "Classic Alterac Valley" World of Warcraft Gold queue that isn't part of the random BG. I don't honestly think it would be all that hard for you guys to implement, considering you must have the old Alterac Valley files still on hand at Blizz HQ.