Even if they would revert the queue changes its questionable that the horde would have much faster queues than currenty.
I assume that in the recent weeks, since faction change to horde is available, many alliance players migrated to horde.
Its probably more the faction imbalance than the queue changes that is causing the long queue times.
I don't understand why they didn't enable free faction change to alliance by now. Its obvious that the factions are extremly unbalanced but for some reason Warmane takes no measures to solve that issue.