Keep in mind glove size and it's effect on Jds' power/speed/accuracy. Those bigger gloves move slower and are way easier to block so your accuracy becomes far more important. I just don't see a pro boxing match against a top boxer going well for any mma fighter. Conversely, mma guys will continue to crush boxers in mma bouts.
Plus, Jds' head is a fucking punching bag in the standup for a good combination puncher....ask Cain.