Glad to see you are still working at this one. I might suggest adding the ears even if just roughed in. They always seem to help me see if the width of the face is right.
I can imagine how hard is to acomplish likeness in 1/9 and smaller scales, so respect Rene, this is starting to look like Ralph.
I would only check the jawline. I think that the horisontal line should be longer, and vertical (close to the ears) a bit shorter, like this :
Hehehe, it is much easier to criticize than to sculpt
But I wish i had your hands, as they really can do miracle.
Now back on that first image, as Antonio said, check the cheekbone, and somewhere I read that this will help in positioning the ears: