Here's where I go off and try to fix things which have been wrong pretty much since the beginning, and fail miserably, messing up the picture as I go.
What was he thinking? I was thinking that her face was too small, and her neck looked weird, and it didn't look like the person it's supposed to look like. So, take a dive off the deep end, since this is an exercise anyway, and start re-painting bits.
Now it's less finished than before, her neck still looks weird, but in a different way, the whole lower half of her face is looking odd, and it still doesn't really look like the person it's supposed to look like. That's progress for you!