Sorry, no help, but some support for you.

I'm in the same boat - I can get a decent morph for Roxie out of the modeler, but her face (around the eyes and nose) is essentially impossible to morph without destruction of some "important" parts.  The polygon flow in her face is 1) too low poly and 2) not well placed for the parts you need to morph.

Did you try setting her subdivision level up in the display while morphing?

I've not used the morph brush for morphs, but have used the modeler in my attempt.

If you find out a way to avoid destroying her eye sockets while morphing, let me know.