Here's a few shots from the day before patch. And the the first attempt at Baracoon right after the patch kicked in. And 2 more from the Wild Tamer event : Dig the changes !
I'm pretty sure theres a limit to the number of summons that barracoon can call forth when he's standing still -- presuming that tiles all around him are occupied. With him teleporting around, every time he hops he's likely to be able to summon forth more followers. I'm fairly certain this is the ramifications of that.
Once you had reached the main bottleneck that leads into the despise champ spawn he had filled every screen in every direction (even northwest where the teleporters are, and to the far far south where nothing but a troll or ogre here or there spawns) with rat mages and archers. You couldn't go to any place there without having ~5-6 rat mages and archers within a few tiles of you.