Splitting players out for separate attention isn't usually a good idea. But it can be okay if you leave behind enough players for them to make plans among themselves. Because players will eat up any amount of time making plans if you let them.
A corollary is that you shouldn't let players have unlimited time to make plans. Because they'll still be going at the heat death of the universe. Don't be afraid to cut them short and declare the action restarts now, whether they're ready or not.
Commentary by memnarch (who has not seen the movie)
Next stop, Kijimi? And since the First Order knows about the location now as well, that sets us up for the next confrontation nicely. That's also a bit more sensible planning than I'd expect from the writers, so perhaps this is just a Comic Irregulars plot idea. Either way, since a factory gate is being mentioned, I wonder if we'll have a rocky world or a magma world as the setting to see.
Fabricating a fake knife? I think that can work fairly well. Especially since I still think it's actually going to be a key of some kind. Hypnotising a guy on the other hand doesn't sound like it'll go well. For one thing, nothing in the script says there's a person to present the dagger to at the gate! There could be a scanning droid to try and detect forgeries for all the players know! Hypnotising a droid sounds a little too out there even for the Force.
Transcript
General Pryde: The other Resistance members got away?
General Hux: Yes. But we have a lead.
General Hux: The Wookiee had a dagger, indicating a rendezvous on Kijimi. They have some well-laid plan...
{cut to the other group}
Rey: So what’s our plan?
Poe: We go to the Dagger Bar on Kimchi and claim our cool surprise!
C-3PO: Factory Gate. On Kijimi.
Poe: I hope it’s an Immovable Rod.
BB-8: How would that work in space, where all motion is relative?
Poe: Good question! But I bet it could really mess up a ship at lightspeed.
Finn: But the dagger said “Present this dagger”. We don’t have it. Chewie did.
Poe: We make a fake!
BB-8: A dodgy fake would be suspicious.
Poe: We hypnotise the dude we show the dagger to.
C-3PO: My memory marbles have 8k stereo video of everything I see.
Rey: So we could make a perfect replica. Poe’s plan is actually good.
Poe: Yeah! We sand it down to make it look faker, then hypnotise the guy!