Phew. 1262 Players later and I'm finally done. I went through the 40-man rosters in-game and updated every single facegen to closely match their real-life counterparts. I wasn't 100% satisfied with the historical facegen pack or the 2012 All-in-One pack so I created my own. Took about a week, likely around 30-40 hours to complete. But it's done.
All of the 40-man rosters facegens have been updated and I'm quite happy with the pack.
I will not that 10%-20% of the facegens in this pack are from the 2012 All-in-One Pack. I went through every single player on the 40-man rosters and if I saw any facegens that were better than mine I used them instead. So credit where credit is due there.
Not included in this pack:
Gerardo Concepcion (CHC)
Couldn't find a good image for Gerardo unfortunately.
http://www.mediafire.com/?dx31ex0kbjbpzby
For best results:
Download File
Extract File contents into your OOTP 13 > Data > fg_files folder
Overwrite any old files in folder
From here I'd like to slowly piece together some minor league facegens. Hopefully this pack inspires some people to help out with that.

Enjoy!