I'd love to see BST make an appearance in this game. I think it won't though because it'd be way too OP, at least if they handled it similarly to the past. There are far too many mobs that would fall into the "tamable" category and are higher than your lvl, readily available in each area. You'd see everyone pumping up whichever stat increases charm success and duration and then destroying everything with lvl 55+ monsters at their side. Cool, but unfair.