Since we’re nearing a release, I thought it worth revisiting some of the earlier ideas which came out of the poll I did or in earlier discussion, but which haven’t seen much consideration recently. So, in case they warrant further thought and discussion, and in no particular order:

Making the smoke around Palpatine’s life support green, as a way of implying an arcane factor to Palpatine’s resurrection (with a hint of Nightsister magic for those who care)
Making Palpatine’s Final Order a bit more of a hodgepodge of new First Order troopers, older Original Trilogy troopers, and sith cultists
Rey Nobody, who was also not a factor in Palpatine’s plan - she was the one variable he didn’t predict, so upon learning about her he simply intended to kill her, before being defeated by her and the jonh ghost squad
Leaning more into the Dyad in prior movies, and possibly incorporating TLJ’s black/white buddha pool into the imagery somehow, though cutting the idea of consuming it being something Palpatine wants to do
Leia as the active cause of the Han Solo ‘memory’, and thus giving her last breath to help return her son to the light
Kylo’s survival and exile on Tattooine - redemption and penance without absolution, and we end with a Ben on Tattooine, just like Kenobi before him
Ajan Kloss as Naboo, to bring the PT into the ST, and for a fitting final rest for Leia

And the one I personally think would be brilliant, albeit for a lot of FX work:

Making Rey’s lightsaber blue but with Kylo’s crackling effect throughout. This would give payoff to the broken lightsaber in TLJ, imply that she’s a little broken/dark-leaning herself, symbolise a change to the skywalker legacy, and pay off the later decision to rebuild her own saber into gold later. But most valuably, it’d echo Kylo’s nicely, and then give some great imagery when she teleports it to Kylo - not only would it imply him turning towards the light, but it would give him the saber he thinks is his birthright but in a broken form.