In brief, Maynard destroyed Edgar in the 1st round and it could have been over very quickly. Edgar held out (some how) and regained his composure in the next round. Maynard effectively punched himself out in the 1st and the following 4 rounds were going back and forth.
Great fight for fans, but a really tough one to call. I agree with the statement "You need to beat the champ to be the champ" and Maynard failed to do that for me. It was far from Machida vs Shogun 1 where Shogun clearly won.
Im gutted for Anthony Pettis, who should have been fighting the winner. After his incredible flying kick (can be found on youtube) I was really looking forward to seeing him fight again, it could now be a while before we see him again.