There is nothing there that indicates model E will be assimilated into Ford Blue. What is changing is that many of the things learned by the skunkworks team are being rolled out across ford blue and ford pro vehicles. The skunkworks team continues as before under Clarke.
The reason to separate them is to highlight how well blue and pro are doing. If it was combined it would say Ford only made 4% and hide the fact that blue was at 8% and pro was at 12% (I made those up but they're in the ballpark). Until Model E starts turning a decent profit they need to be reported separately.