This was a good fight, better than I expected even. I was expecting Mayweather to have an easy night, but Mcgregor was a surprise and I think he had more success than many have with Floyd, but it could have been because of the way Mayweather chose to fight - with a more come forward style.
I thought McGregor would have a difficult time because of the physical size of the boxing gloves (and Mayweathers exceptional defence). But he was getting through with some of those uppercuts.
I think what ultimately may have let him down was just being heavier muscled which makes more sense for a UFC guy. But with boxing where you have to throw and throw, heavier arms can be a disadvantage in later rounds.