I was hoping for an assault/defend type of event. Where the Alliance knew the horde were coming but still failed defending the onslaught. Seems more honorable than "bomb from afar" Did the undead wear off on Garrosh?
Or given the PvP nature of MoP, it would have been bad !@# to do a BG event instead of a scenario, where you can queue for a week, and only get the feat of strength if you win. Then have the cutscene with the bomb, sort of like "crap, we fought a good fight, but the horde still takes the field" (from the alliance perspective obviously) If horde won just clear out and demoralize the Alliance with a super weapon.