He has a joint on that G Rap/30 Spesh project (which is really a 38 Spesh album). He's produced a few tracks for Hus Kingpin. And almost everything else he dropped this year is with some sort of "underground" artist. He did tracks for Evidnence and Apathy's recent projects, and I believe he puts out Jamo Gang on his label.

Otherwise, the only other thing he did this year is the PRhyme 2 album. He didn't even produce anything on Book of Ryan.

So I suspect that what's stopping him from working directly with these dudes is the other stuff you mentioned: rates and availability. It's also possible that both he and them are just too busy to link up.