I came across this rather insightful video on youtube. I think the guy explains a lot of things in the fight and it leads me to conclude that Lomachenko beat Rigondeaux with superior footwork and positioning and was the more versatile fighter. Rigondeaux on the other hand wasn't able to adjust when his normal style of boxing failed to work, that's why he quit. He just had no answer to what Lomachenko was doing to him. Anyway the vid is worth a watch as there are some good technical pointers on what allowed Lomachenko to fairly easily beat a very good boxer in Rigondeaux.