This is why this fight was interesting:
1) Yi Long's boxing is usually way more effective, landing many more punches, and more heavy & damaging hand strikes as well
2) Buakaw didn't throw zero leg kicks, but he threw MUCH LESS than normal, ostensibly because Yi Long fights in closer than most, and puts more forward pressure than most, so he wasn't in Buakaw's comfortable leg-kick range as often.
C) Therefore, Both fighters had their Main Offensive Weapons hindered because of their opponent's defensive AND offensive style
IV) Also, it appeared that Both fighters were GASSED a lot quicker than usual, because of their opponent's aggression.
I call it a Draw! They need to fight again until someone FINISHES, and THAT'S how we know who won.