I've read no less than five (5) preview threads about the Guild Wars, and I've seen absolutely nothing in any of them that has anything to do with Bone Dragon in particular, or troop balance changes in general. I've been playing since the launch date on Steam, which means more than two years now, and this is by far the single most significant balance issue in the history of the game, and it has remained untouched for many moons. I can't find the post, but at one point Sirrian did in fact say there was going to be a short-term change at the beginning of the next event cycle, and then posted on the Monday that the change had been postponed a week, and then... silence. I'm not suffering from dementia quite yet, TYVM.
In addition, the question I have put forward several times, about how the client counts "blobs of skulls" as multiple matches, remains unanswered. There is code for this somewhere, and an intended algorithm, and the players are entitled to know what that is, as it constitutes one of the most basic rules of the game.