The main issue at this point is simply that everything on the front of the face needs moved down. Second to that, the top of the skull needs a bit of attention, as its current shape gives the impression that the face is slowly sliding off the front of the head. The jaw will also need addressed aggressively, although since the lower half of the face is so new, this is not surprising and a lower priority.
Applying the rule of thirds seemed redundant since I just compared my skull to my actual head, but moving the eyes and nose down in this photo does immediately help it to look more human (although still bizarrely narrow. I keep measuring, but it keeps being SO NARROW!)
However, something about this skull still doesn't feel right -- aside from its lack of width. I have always been aware that my forehead is perhaps a bit large and wanted to see if the rough rule of thirds was actually what needed applied here.