The thing is, it wasn't like they were really tearing it up under Pittman. They were a throw first team last year and that played to their strengths. They still struggled to run the ball when it really came down to it. This O-line has never dominated the line of scrimmage like a top quality O-line should.
That said, I thought they should have kept Pittman simply because they were showing improvement under him and the continuity would have probably benefited the players and he probably would have helped us keep our lone significant O-line commit for this last class (who went with him to Arkansas instead).