Indeed he should have stipulated in the deal. It seems to be a matter of wanting to keep a controlling hand while not having to do the work akin to not directing yet trying to influence ESB and ROTJ.
The best time this worked was the EU where George was consulted but as long as things were in parameters and had context most was fair game. Over time with the films the problem became that all of the filtering voices of dissent dropped off or were abandoned so that by the time of the prequels everyone had to work with what was given and there were no revisions done-largely AT ALL. That’s where the problem lies.

He should be saying Disney does nothing new story wise. The bigger problem is a complete lack of story context with anything SW related. The new films really have nothing to do with the original series as conceived outside of brand iconography. I don’t blame George for anything and never have. I think he got focused on building up the company instead of telling great stories and this is where everybody’s paths diverged.
The only thing I truly regret is him selling out to the very thing that represented what LFL was founded to rebel against.

And the whole going back to film is a misnomer generally used for marketing. Everything is done digitally in effects and post anyway outside of a few exceptions and the film shoots will do a immediate scan back to digital where everything is manipulated to within an inch of its life thus making the original capture methodology null and void.