For the texture part of things it may be easier to work on the texture with the morph turned off. After you get the texture settled with the right landmarks, then start working on the morph. 

Texture-wise you still need to move the nostrils in and get those mouth lines moved closer to the mouth. The chin shadow may need to be painted over so that it's lighter. Shadows are tough to get rid of on textures and it's hard to find well-lit head shots out there.  And good side views are even harder to find.

Keep at it, though, you're doing well 8-)