I think a large reason why we haven't been able to is they've been a feeder program for the NFL with regards to defensive lineman (and everywhere else, really).
Meanwhile... we had VFL's (who I sincerely appreciate and will always root for) who have started for us the last 2-3 years (Spraggins, Mays, etc) who didn't even get UDFA looks.
It all starts up front. Thats why while I love Coop and Sprags and Ollie Lane etc, I'm beyond excited to get some fresh blood up front.
If you want to compete with UGA, it starts with a big physical OL.