Mo is certainly a great runner, and now has several impressive victories & times in the half... BUT he has essentially had great pace makers in these races until the last 400-800m when he kicks for the win.
He has seemed close to breaking in the middle parts of these races at times, so it is hard to imagine him running ~a minute faster in situation were he's out on his own the last few miles (although, I imagine he's never trained and peaked for a half so he could make a big jump in fitness)
Given his 3:28s, and his strength in the half, his best shot at a WR could be the 10000 (I believe KB has said it is weak).... I'd also love to see Mo go out in 3:40 in a 3000.