No, he's not a big LW. He's average and will be nearly 4 inches shorter than nate, a guy who fights tall and knows how to use his height to his advantage.
Don't let the 2" reach advantage deceive you, height is more important to functional reach than arm length.
The fact that people can't see how conor's counter punching style will be handicapped when facing a guy who can jab him in face while remaining out of reach makes me want to put a huge bet on this fight.
The same people that think this will be a cakewalk for conor would have picked MJ to walk through nate as well.