So this is where I'm at now.

I did a complete new mesh and boned it, then set it up for EasyPose.  Obviously it's not entirely smooth near the tip, but as long as you don't go for extreme closeups in extreme poses, it's not bad.  You can't see it in this image but the base extends for a bit inside the head and is rounded so there's some flexibility in positions.  Also not visible in this image is that it's been cylindrically UV mapped.

Also, I did an ear morph for the V4 head.  I've looked at enough pictures from Lucasfilm and associated material that makes it clear the female Twi'lek ear is a cone (as opposed to the human looking male ear).

Next on the agenda are some headmorphs in ZBrush.  I'm thinking at least two, probably three, as there are significantly different assorted headshapes that have been portrayed.  They're almost as bad as Klingons.