It is not broke, and it has not been considered broke for 10+ years, with 10+ expansions released taking into account how something was done, there is no reason to muck around with it. Mucking around with something that is not broke just alienates your player base. Why aggravate the player base with stuff like rearranging AAs, the net result of which hot buttons stop working while players have to track down new alt activate numbers, or TBG / spell casting reinforcement on this patch, or unannounced changes to mobs abilities on previous patches, or massive reduction to AA in older zones. To my knowledge, neither TBG nor spell casting reinforcement was used in any way to exploit something in the game. There are plenty of stuff that is broken that does warrant attention, like intermittent lag on the server, advanced loot window does not display everyone in the group / raid, so loot can't be assigned to the person that is not listed. Or how about addressing the issue with anchors in guild halls?