Great points ajp. I think the biggest selling points of George's ST would have been:
1. Allowing all three trilogies to have somewhat unique conflicts. Droids/Gungans and Droids/Clones in the PT, Empire vs. Rebels in the OT, New Republic vs. Alien Warlords/Criminals in the ST. It would have been neat to see each trilogy have such separate visual languages. Obviously there'd be some overlap (as there was with the OT and PT), some "rhyming" and what not, but it wouldn't have been nearly as obvious at a mere glance like what we got with the Disney ST.
2. It would have definitely made the ST more "toyetic" to have Maul/Talon, a widely varied "pirate fleet" of ships, aliens, and what have you. The Ducky's of the world who prefer that sort of thing over quality cinema would have been very happy.
3. In George's *original* plans for the ST (back in 1981-82) Leia was going to be crowned "Queen of the New Republic" at the end of ROTJ with Luke and his sister facing Palpatine in Episodes 7-9. So him making Leia the Chancellor would have made for a cool circling back to at least one of those ideas (and I'm all about honoring those original ideas which I strongly believe TROS accomplished with Palps' return and the "Force Dyad".)
4. Lastly, and possibly most importantly, people would have had an easier time accepting the "legitimacy" of George's ST and therefore given a pass to more of its flaws just for the simple fact that it was George himself at the helm, despite the fact that he too was going to negate his entire post-ROTJ EU and much of his own "
Chosen One" BS.
The Cons of George's ST as I picture them:
1. *Everything* post-ESB from George always sounds so much better on paper. I can easily describe the broad strokes of the PT and make it sound like the pinnacle of escapist fantasy cinema. But I can almost hear Han Solo himself say "look kid, good on paper is one thing. Good after George has the final say on everything? That's something else..." So who knows what crazy *** things that he would have thrown into the mix that would just utterly ruin everything (sure Maul, Talon and the Pirate Armada vs. Leia's Republic and Luke's Jedi Order sounds awesome...until Luke and Leia's heads pop open and the freaking Whills crawl out and start singing "hello my baby, hello my honey, hello my rag time gaaaaal".)
2. I think having Maul rise to power after six episodes of Palpatine pulling the strings would have made George's ST feel even more superfluous than the current ST. It would be the equivalent of Karl magically coming back from the dead at the end of Die Hard for one last "raaaargh!" but spread over an entire trilogy instead of just a quick gag at the end. Ask any fan of Die Hard, they'll tell you that even if they liked the Karl scene it just absolutely was not necessary. Now if *Hans* himself had miraculously survived his fall (landed on some scaffolding three floors down or whatever) at least it would have had a more legitimate feel of "whoa, this film isn't over yet." Not too unlike Jim Cameron's trope of the T-800 rising from the fire or the Alien Queen surprising everyone on the Sulaco.
But a mere henchman pulling such a stunt? Well then it just feels more cheap, gimmicky, and unnecessary. So I'm glad that the current ST took the more Terminator/ALIENS approach with regard to turning a previous victory into a "false ending" and having the main bad guy himself return for one last showdown.
3. Carrie's death would have ruined George's ST just as badly as it did Trevorrow's entry. Not that it would have been George's fault by any means (other than him choosing to just wait so stinking long) but we'd still have another trilogy where not only did Leia have to be gently transitioned out of the story but the new *Chosen of the entire 9 film Saga* no less. Yikes, what a disaster that would have been!
I think the best of both worlds would have been to have broken free from having Maul and the Whills in the ST as they did but then just use the coolest elements of that story in the exact way that they were seemingly going with "Solo." Just have the Maul criminal armada take place in standalone films between the PT and OT or Disney+ spin off shows. Maul being a wild card against *both* the Empire and Rebellion could have been awesome. Then they get to indulge in everything cool about his character without putting the weight of an entire trilogy on his shoulders.
Too bad they "wasted" his (second) death on a show like Rebels. A Mandalorian quality "Maul" series where we see see an extension of his TCW Season 7 character and final end could have been awesome. Sure it was a decent enough moment in Rebels but they really could have played it up much more spectacularly in live-action.