The concept for Rogue One was created by acclaimed visual artist effects supervisor John Knoll, and the Han Solo movie didn’t come from Lucas either. So, it would seem as though Lucas’ input may have been limited to the concept of anthologies and spinoffs in general. Then again, there have been rumors about a spinoff centering on Obi-Wan Kenobi, which actor Ewan McGregor has already expressed interest in, so perhaps Lucas’ fingerprints will be found on that should it see the light of day.
As for the rest of the Star Wars universe, it appears everything is in good hands since Disney’s successful acquisition of the property. And with an entire universe to explore, Lucasfilm won’t be running out of ideas anytime soon.