You can't really call his ground game solid because it hasn't really ever been tested. His only two losses were 1st round submissions. He could roll through Mendes of he catches him, but Mendes has just as much power in his hands and is quicker. Conor hasn't fought a top 5 fighter yet. The dropoff from Aldo, Mendes and Edgar to the next tier of fighters is incredibly large so all of them roll through the lesser competition. Hell, Mendes just ran through Lamas who is ranked 5th and just fought for the belt last year.