Speaking of that Kennedy interview...
"No source material?" LOL, wut? The ST has the previous six Episodes.
Rogue One and
Solo are based in large part on parameters set by the OT. And not only is there decades of old EU stuff to draw from (including, yes, comic books and multi-hundred-page novels), there's new books, comics, games, TV and more being churned out all the time... so if her point is that Lucasfilm doesn't have a wealth of ideas to draw inspiration from the way the MCU does, and the top-level deciders are having to build every from scratch by themselves, then... "OK, Boomer?"