I possibly wonder if some of that was due to the hoopla of having Bryce be inextricably linked to Daz Studio?   Didn't that happen before e-frontier made its deal with e-on for Vue's native importation of poser files? 

It doesn't make good business sense for e-frontier to sell the SDK that's developing a rival product to Poser.   I'm not saying that DAZ does practice questionable business practices, however, it wouldn't be too difficult to make innovations with DAZ Studio with access to the SDK.  

In the end, its the end user that loses out, and I'm afraid that we're going to have more schizms as the DS and Poser diverge.