This is terrible. I wonder what else Disney offered to get George to sell. You would think the super lucrative continued merchandising and licensing of Star Wars meant LucasFilm is worth more but I guess maybe not.
Seems entirely likely that Lucas is just getting older and just is tired and doesn't want to deal with it anymore. It's not like he's not already outrageously rich. It may have been a comparatively low price, but what is a man already going to do with that much money?