My feeling on the ghost thing is that people can try to explain the exact “procedure” for ghost apparitions however they want; but the canon is full of contradictions in that regard, so I don’t really care about the logistics. Bodies vanish except when they don’t. People have to be taught the technique before they die unless they appear later anyway (Anakin, in both regards). The details don’t matter.
So in that regard, I was leaning more for the large group myself (helping to tie all of the saga together), but I think Neerb may have actually convinced me otherwise:
I think Leia appearing as a ghost in the Palpatine fight would hurt the payoff on Tatooine where Rey sees Leia, without adding enough to the Palpatine fight to compensate. Rey hearing Leia’s “always,” which Hal has already incorporated from the trailer, is satisfying enough without being distracting.
…
Maybe it’s just me, but when the ghosts appear against Palpatine, I see it as a kind of catharsis where these Jedi that have spent decades against The Sith are finally getting their due; Sidious is literally facing his ghosts.
Well said, friend. (Of course, Mace fought Palpatine too, but I can ignore that.)
But regardless of what I want, Hal has made his preference for the Ghostly Quartet clear by this point.