There are a way to make a lot of faces in a few time and with a great result. People from pes already make it.
The system consists in use facegen to create the faces and then with a blender script transform a ingame face to the one we have created.
To do this first is necessary that someone makes the template model of a fifa face in facegen using facegen customizer using this tutorial:
then using that template all people could make great faces in a few minutes following the tutorial made by cherif nour for pes faces.Here is the spanish translation of that tutorial.
If anyone has the original post it.