Also, we have no plans to do FX work on Kylo Ren’s hood in the second Snoke scene; it seems like something out of our reach.
I think it’s actually very much doable (for someone who unlike me has any skills in that area) as the only shots that need editing are those where we see Kylo (and Hux) from behind, looking up at Snoke. And there is a shot with the same camera angle that shows Kylo with his hood. So it should be possible to take Kylo from that shot and put him on top of the unmasked shots.