Also keep in mind in this discussion that Hollywood Studios DOES celebrate all Star Wars, just not in Galaxy's Edge. Star Tours is still going strong and takes you to planets all throughout the Canon, with cameos from C3P0, R2, Vader and I'm sure others (I've only seen a few of the 18 possible destinations in the ride). It takes you to Hoth, a Star Destroyer, Tatooine, Kashyyyk, Jakuu, the Death Star run, Naboo, Geonosis, Crait among others. The queue is a trivia treasure trove from the franchises history. So to say that they do not celebrate the whole of Star Wars is just incorrect. That is just not the story they are telling specifically in Galaxy's Edge.
Not to mention the Trials of the Temple live show which happens right next to Star Tours and stars Vader as it's main bad guy as kids learn to be Jedi warriors.
I think they should move the SW character meet and greet from the utterly lame and pointless Star Wars launch bay into one of the unused spaces at GE.
And you could still have characters like Yoda and Vader from across the franchise.
Just call it Drex Movi's Holo Encounter or something. Come meet an interactive "hologram" of some of the greatest or most notorious figures in galactic history.
Boom. Classic characters inside GE.