I think one possibility is that, instead of buffing Mage's, SE looks for a way to make Army's a touch more interesting in i.e. a 6.1. After all, the reason we dislike AP > MB is because AP is lame. It's not like MB is awesome or anything, it's just a nicer filler phase compared to AP being an incredibly boring one.

Everyone expects one of the DoTs to go away sooner or later, so that leaves Iron Jaws as a blank slate that could become a skill that's related to Army's in some way. Tons of different things they could do there.