Good to hear you are trying out new things, my friend. Especially one such as yourself who has been successful doing things a set way for so many years. Best of luck to you with this new technique! My personal opinion of it is that it's a good way to get great results in a fast amount of time. But to me, layering is just the preferred way. That's not to say that we all don't use the basis of 2 brush blending, which is just skill at feathering. I've always wanted to try it tho just because it looks like a lot of fun.
Your results are great for your first time around. Especially the metallics. The skin is a bit thick in places with the shadow pigments, but nothing you won't steamroll over in a short time.