Heya! Just wanted to add my two cents into this awesome project.
I've been experimenting with rigged, animated mesh heads for personal use since about 2011 or 2012, and may have found another reason why bone translations would be greatly appreciated.
While the 30 extra bones in the face are absolutely amazing to mess with, and they do work relatively well, Louis here has a rather.. long head, and with the facial animation bones as they are, they sorta don't match up all that well (the mouth and nose, mostly, and the eyes just a bit, but the eyes being off-center may have been my fault).
https://gyazo.com/771a65a08858d2da6f86b2ffc4bb381a
If i were able to move those bones where they 'should' be according to his facial structure, then I could make the corner-lip bone actually do more than make him smile/look a little constipated.
If that's possible already, then I do apologize for posting without testing that just yet, but it seemed like something relavent to add! 8D