Yeah, I think that he just needs to learn a good submission game. He's virtually a taller Matt Hughes, and as big a fan of Hughes as I am, Hughes would be absolutely boring if he didn't have a good submission game. Hughes & Speer are great wrestlers and have a ton of power, but Hughes can finish a fight because he can submit you or maybe get a ref stoppage. Tommy just needs to improve his submission skills and maybe hit harder when he has mount to get the stoppage. He'll improve though. He's young and has a bunch of time to learn.
My favorite fighters of all time: