I feel like Cosmonaut Variety Hour’s perspective is a pretty fair assessment. He likes all the Luke/Rey/Kylo stuff, but he feels the Finn/Poe/Rose stuff is pretty weak in comparison.
RJ said he created Rose because he felt Finn and Poe had the same voice, but imagine the Rose and Finn conversation about war, but Poe took Finn’s place and Finn took Rose’s place. Poe likes being the hero and does whatever he can to win, but considering Finn is a literal child soldier, he knows all about the costs of war.
It’d come at the expense of one or both of their arcs, though.
Not necessarily. Poe was already setup to learn the dangers of recklessness with the opening fight. He is demoted by Leia but then resorts to a new plan as is the original. I think it’s pretty simple to swap out learning to follow orders with Holdo with learning about the horrors of war with Finn on Canto Bight. That would be the first step to his arc. The second step would be when his “plan” falls apart right in his face, which is when he realizes Holdo is right.
Finn’s arc to fight for a cause is also adaptable. He could give the same speech as Rose, only instead of those reasons why he chose to right for the Resistance, make them why he hates war. Establish he’s only in this for Rey and Poe’s sake. Meeting DJ is when he realizes the errors in his ways.
Also, Finn and Poe can kiss on Crait!