Part of the reason I think this happens is b/c artists want the Dre beats, features & media push. Last 2 artists to get it were Eminem & 50 Cent. Everybody else promoted themselves heavy. Kendrick Lamar the only one who hasn't used his Dr. Dre cheat code yet..... Dre is the best for artists who want technical development from a musical perspective but not from a full developmental perspective.
Connor can blow but he needs to flood the gates with music. Dave East is remixing every major song that drops, $pitta drops a new mixtape every month, J.Cole & Drake go on 2 year long tours, Migos market themselves everywhere, etc. Jon Connor had a MEAN buzz when he was flipping the Kanye West joints, shoulda never stopped.