LOL, having only listened through them once so far I wouldn't dare to give a judgement on quality control as I got lost somewhere in the middle album (which on first listen felt like the weakest of the three) and never really recovered. There's definitely some great tracks in there but there's way too much to digest and I'd rather he did a staggered release through the year to allow each one to live or die on its own merits.
Interestingly, and I can only assume this is intentional, the first album features the most "family" tracks (e.g. B-Legit, Droop-E, etc), the second album seems more old heads focused with Tech N9ne, Spice 1 and Dre Dog among others and the third seems like a combination of both with everyone from Kendrick Lamar to Heiro.
I think there's enough quality in there to make the task of compiling one uber album a tricky process and from first listen I can only recall a couple of absolute clunkers but I would gladly take advice on anyone who wanted to offer a slimmed down view.
Thanks for posting the Matthew Africa link as well, know it will be great even before I hear it.