However he is not that good a film maker or screen writer so he lazily decided that revision was easier than trying to fit what had come before.
So he got out his crayons, scissors, glue and giant eraser and sullied the original films.
Why not simply let Anakin keep his eyebrows in ROTS? Why erase them from ROTJ? Why not hire an actor who looked more like Sebastian Shaw? Why the cut & paste? Why not use contact lenses on young Anakin? Why recolour the original?
It's stupid, they're stupid changes and Lucas is a stupid fat old man who has completely lost his mind.
We need to preserve his legacy and protect it from him.