I have not seen the Matrix demo yet. Maybe they did not add a lot of facial rig in matrix demo.
I can always go back to iclone character creator, with all the details and bring them into unreal and use meta human hair. I am not much of a character modeler.
Yes eyes are difficult but iclone handles eyes animation well.
I am creating a big town right now using megascans and objects from Zbrush and royalty free props. Once I finish that I will start testing meta-human and iclone character creator with unreal, to check out which works best for me by making very small video ads. Only then I will be sure what kind of cinematics can be done or that I have to go back to Maya.