I posted this a while ago, in context of how our Jeannie -- who is supposed to have perfect recollection -- keeps forgetting about her own power. :D...
I'm pretty sure the main motivation was Marvel trying to portray him as wrong during the era, hence "Cyclops was right". It also picked up after AvX...
He was also charged up by Storm once, forgetting the issue at the moment. Pretty sure it was by Claremont. I don't think it made his beams stronger,...