Yes we do, this is the management org chart of Lucasfilm. http://lucasfilm.com/our-team
Lucas does not own it. He is not an employee of it. He is not an employee of Disney.
There is no secret status, it is now part of a publically traded company and it's all open book.
And if he doesn't show up in anything anymore except to say he's no longer involved, I'll happily lick my core rulebook and admit I was wrong. But that chart just says he's not he big boss anymore, which we know. We don't what what he actually is, what he actually does, and what kind of clout he still maintains.
Is he just a treatment writer? Does he still get to do Rebels story meetings with Filoni and pals? Is he still going to have Exec Producer Credits on the new films? Will his wife and kids still get cameos? Was he required to get a tattoo of Mickey on his buttocks?
That's things we don't know, and only time will tell for sure. But for now I'm stick to my guns and saying that there's no reason to think that George doesn't have a significant role in the future of the IP. Just because it's not officially his doesn't mean that Mickey is locking him out, and if history is any indication, Mickey's probably at least still letting him shoot the quadlasers.
These are publically traded companies that are required by federal investment disclosure law to release everything about who runs these companies, so we do know. There is no secret anything.