In The Last Jedi, Finn leaves with new character Rose to Canto Bight to find someone who can help with a crucial infiltration mission to save the Resistance.
Some people felt that Poe’s time would have been better spent with Finn bro-ing it up on Canto Bight.
Apparently, writer-director Rian Johnson felt that way too and said during a Q & A with Collider that in the very first draft of the script, Poe was the one going to the casino-oriented planet.
You need friction to make fire, and with no conflict between the two, it makes sense that those scenes felt as if they were going nowhere.