Couldn't the IK and animation be overhauled with a 3rd party plug-in? 

If you have z-brush, then the morph brush is rather pointless. Of course if you don't have z-brush then it's a handy tool. I do know that DS handles GoZ much better than Poser tho. That's one of the features of DS I prefer over Poser, and since I do use z-brush, DS not having a morph brush is irrelevant to me.