As in, I really think it would be so awesome if Poe was gay and it was mentioned casually.
100% agree. Romantic relationships (other than the initial weirdness of Luke/Leia resolving to Han/Leia) don't really factor in super tremendously in this particular story. While it would be a really positive step forward, it's going to be really, really difficult to do without feeling like it was shoehorned in.
EDITED BECAUSE I MISSREAD YOUR COMMENT.
Agreed! I think Star Wars is at its best when its about friendships and family first, and romantic relationships second. As it is, I think it could be an offhand comment and wouldn't feel like they were making A VERY SPECIAL STATEMENT lol. Maybe casual viewers would notice, maybe they would blink and miss it. But it would then become part of the "character bible" for Poe and would factor into any spin-off novels, character bios, etc. And we would finally have a queer character to identify with. Everyone wins. Finn and Poe can be besties, and everyone can keep writing slash fic about them
(doesn't stop Spock/Kirk or Sherlock/John shippers!)
This isn't because I'm thinking they have to 'sneak the gay in, but just I really don't like romance in Star Wars. Han/Leia was, by movie standards, a pretty lowkey romance honestly.