I think this fight would be very similar to the TUF 8 Finale with Phillipe Nover. Except Efrain would get the sub. Like Phillipe Melvin is an explosive fighter looking for the big KO. Unlike Phillipe Melvin's BJJ is a little suspect.
Efrain changes levels takes Melvin down passes his gaurd subs him in the first round. I mean come on Melvin was being controlled and was almost submitted by Gabe Rudiger. 6 out of Melvin's 7 losses came via submission all in the first round. The guy is a really exciting fighter but this would not be a good match up for him. I say let him and Junie fight. I think that fight would be great no matter who loses the fans win.