This is just a little teaser mainly for SereneNight. In the pics below, Genesis is in Red Shorts and Genesis 2 is in Blue Shorts.
1. This is Genesis in full-on M5 shape, not Hero (sorry, I would have to do some extra work to demonstrate that Hero shape) standing beside Genesis 2 with M6 Body and M5 Head.
2. This is still Genesis with M5 body and head, but Genesis 2 with M6 Body and the head is 25% M5, 100% Genesis, and 75% M6.
So you see you will be able to blend Genesis shapes, including the base head shape, with Genesis 2 and M6 to get a fuller face, which is something you said you wanted. Or the M5 head altogether, with no M6 head. Applying the Hero Shape from M5 would require aligning the joints to the figure, then resizing to 108.6 (Hero Scale) and dialing out a bit of Genesis body so it doesn’t fight the M6 body shape. If DAZ gives me the go ahead, I will provide more examples.
Edit: The pose is an M6 Pose, so I had to use Handy Dandy on Genesis (M5) to convert the hands to a Genesis 2 Pose, but you can see it worked quite perfectly.
Click thumbnail to see full-size image