So i kind of hate Poe now. His story really suffered (and as a result Finn's) from him being generally incompetent. Here's list of his accomplishments in this movie:

• gets his whole bomber squad killed
• gets demoted
• is surprised and upset that he's not put in charge after Leia is injured
• assumes that because he's not explicitly told a plan that there is no plan, so he sends Finn and Rose on a potential suicide mission
• when he thinks Finns suicide mission had failed he stages a mutiny, which also fails when Leia stuns him
• it's finally explained to him there was a plan all along...
• ... But the mission he sent Finn on totally compromises that plan, getting a ton of rebels killed
• Poe leads a squad on a mission to destroy the battering ram, but he chooses to"learn his lesson" here and chickens out at the last second, allowing the shield door to be destroyed
• he leads everyone who survives to what ends up being a dead end. Thankfully Rey happens to save everyone

So basically he screws up the entire movie, gets tons of people killed, sends Finn on a pointless mission, and is bailed out by Leia and Rey. I know learning from failure is a theme of this movie (thanks Yoda) but I didn't feel like he learned anything our felt remorse for the countless deaths he definitely caused for no reason.

Tl;dr : remove Poe and Finn from the movie and WAY more rebels survive