Mike, no matter my eagerness.I haven't yet had the chance to try out the new download of Brad  myself yet.

So based on rjjack's  render,and because I'm so mad-eager to see this extraordinarily rigged baby housed in an attractive figure that everyone will want to use I'm going to throw at you my  immediate and quick observations. I agree that the head is too long the ears too small, the neck too thick and short  which should narrow at the base of the skullt. Also upper arms I find too short as in the  inside elbow  crease being too high up  and the forearms  too thick for the upper arms.
A longer leaner look rather than stocky would be my wish also.

 I think you are right to consider using your earlier shaping of Brad  which was better and more attractively proportioned to my eyes and it might be less work in the end.  Since you are going to work on the face  yet my wish would be for a bit more definition and angularity to get away from the too rounded baby-face look. The brows a bit more jutting the eyes a tad more inset, the nostrils less wide the chin less long and more angular.  I realize if the ability to dial these features in will be available it makes for more versitility to start with a sort of generic face though..
 
Mike I think you asked for feed-back so I hope my input is not too terse and critical considering that I'm not even a modeler   Brad's 'abilities' are thrilling and I'm sure his appearance will catch up with it with a bit more trial and error. Thanks for sharing it with us and letting us contribute with our observations.  Keep on keeping on!!

Cheers!