All symptoms of staggering mismanagement by Disney, of course. A trilogy with a stupid planned plot arc would have been better than the sequence of "solid but uninspired Star Wars throwback" + "interesting and out there reinterpretation of the mythos" + "but what if RotJ again but dumber?"
Even the Star Wars expanded universe was carefully and competently taken care of prior the acquisition - so many books and yet so little inconsistencies. Then Disney decided to throw all of the decades of worldbuilding away for three shitty plots and an endless lot of Rey-based Rule 34 material.
The Star Trek reboot quality is similarly questionable, but at least they didn't simply go ahead and un-canon all existing works.
(Seriously, time travel as a concept is annoying, especially when everyone uses their own version of how it works!)
Good on ya to point out the silver lining.
ETA: not to mention, the "character dies and gets reborn" plot was already questionable in TCW (where Darth Maul was revealed to have survived being sliced in half by Qui-Gon Jinn in Episode 1), but that one at least had a decent bit of usage... Palpatine's appearance was mostly the reveal at the end on Exegol, a fight and his (hopefully final...) death.
The only way I can see any future films being set is somewhere between the trilogies (there's more than enough to be explained between EP3/4 or between 6/7) or an alternative-timeline reboot happening after EP6 (or maaaaybe but difficult given the deaths of primary actors, a timeline split caused by the destruction of that superlaser planet).
This of course ended terribly in Episode 8 when Johnson single-handedly destroyed everything Abrams had put in place and left him nothing to go on for the finale.