For our project we are using Genesis 3 as the base frame work and have been doing so since 4.0 which at the time had a lot of deal breaking issues and at that time morphing was CPU bound and the performance impact of a single actor was a performance drop was between 25-45% and unusable. Since then the problems were solve by Epic so my thinking is Epic was aware of the issues and fixed them. So as a group we have been testing different configurations with the idea of including Daz Studio as part of our character development along with each update to UE4 continuing to improve.
Some test examples using G3
So in support as you your comments morphing, now being hardware rendered, is no longer an issue it use to be.
Just some thoughts