Okay, I’m going to jump back into this thread for a minute because this prophecy angle could actually be really interesting.
If Palpatine survives ROTJ as it has been established, then Anakin never fulfilled the prophecy at all. This actually makes the prequels more interesting to me, since the old Jedi Order was right to be mistrusful of believing the prophecy and right to deny him training (at least at first).
Furthermore, if the prophecy is unfulfilled after ROTJ then TFA’s first lines of dialogue make a lot more sense ‘I have seen too much to ignore the despair in the galaxy. Without the Jedi, there can be no balance in the Force.’ If the Force was ‘in balance’ at the end of ROTJ due to Anakin’s sacrifice, it would have had to fall out of balance at some point, but we are never given any definitive point at which that happened. Much better in my opinion to simply have the Force out of balance for all of this time, since the re-establishment of ‘balance’ would end the story full stop.
Finally, if Anakin didn’t destroy the Sith then there’s a good argument that he’s not the subject of the prophecy, freeing it up to apply to someone else. And this is where Episode 9 could really shine, by dethroning Anakin as the chosen one and elevating someone else (presumably Rey but maybe Kylo or Luke).
That doesn’t sound very respectful to Lucas’ story though, unless he intended such a direction for the ST.
I’d argue that actually trying to recontextualize elements of the PT would be more respectful than outright ignoring them, which is what the ST has essentially done.