I dunno Edgar, they can probably imagine quite a lot. Bribing an officer to out the mole in the Resistance would probably work well enough at least, if that's not yourself. Holdo better send someone else with the money if this plan somehow gets used, otherwise we'll have Han Solo 2.0 on our hands. It'd also have to be really quick or make good use of camera editing to get pulled off in time as the First Order fleet is still out there.

I recently realized that Luke somehow had a decent amount of training time in Episode V but the group in the Falcon spent a lot less time doing anything. And then again with the Episode VI Yoda scene into the Rebellion planning session. I wonder if we're having something similar in this Episode. As long as the writing is engaging, the plot hole is minor enough to be ignored. The encoder/decoder bracelet bits make me wonder how instant a communication method it is as well. That is, if it's just leaving messages to be played back later, then we could still have potential time skips like that without worry.

Hmmm. Movie-side guessing; it's a little hard to tell, but it seems like Edgar came up to ask Admiral Holdo something rather than having a back-and-forth like the comic. Maybe it's the body positioning? Holdo's only turning her head while Edgar's leaning a bit in panel three. If so, going to ask Rey to come back would be nice as then everyone would be in one place again later, but I don't get the sense that Edgar would make that kind of request. I'll bet he's asking what his good buddy Finn can do to help who's totally not suspiciously missing at the moment.