I barely rate him as an MMA fighter at 145, let alone 155 and beyond. I think he manages to starch Tony Ferguson during one of his pocket sand maneuvers, but everyone else in the top 15 at lightweight could end Conor's life at will in the octagon.
The connor inclusion is about his impact with the UFC. He put the UFC in a different light and further amplified its importance in popular culture. He wasnt a bad fighter as well. A 2 time champ and is the only fighter in UFC history to hold 2 titles at the same time. His inclusion is not without merit.