EXCELLENT article from Fightland on how rule sets dictate certain strategies and why wrestlers are more successful in MMA then sport grapplers. Serious food for thought here on how you are training...
http://www.groundnevermisses.com/2014/11/are-jiu-jitsu-competitions-to-blame-for .html
Let's be honest here. Jumping on your back and pulling me I between your legs doesn't exactly show dominance. Wrestlers end up on top. Everyone wants to be on top. ;)
The bjj guard looks like the missionary sex position. You want refs to award points to a guy who pulls you down into that?