I think it would've been very neat if Gabe and Carver met. They could talk about whatever ex-military guys talk about. Talk about how amazing it is to shoot with a pulse rifle or something.
And they could talk about their dumbass boyfriends. Like, Gabe would just go off about how Nate is too happy for no absolute reason, and that he's too optimistic (but loves him that way anyway).
And Carver can talk about how stupid Issac can be (for a man who's literally the smartest guy). And that Issac likes to joke around a lot during serious situations (but still loves him that way).
And while they're talking, Nate and Issac plan something stupid, it fails, and they get in trouble and get lectured by Ellie. But Lexine would go up to Nate and comfort him by saying he was just trying to have fun.
THEN ELLIE WOULD TELL GABE AND CARVER WHAT NATE AND ISSAC DID AND THEY'LL GET SO PISSED. THEN THEY'LL START MARCHING DOWN TO THEM AND GABE WOULD JUST TELL NATE HOW RECKLESS HE IS, WHILE CARVER TELLS ISSAC HOW CHILDISH HE IS.
But Nate and Issac, being dumb dumbs, would just burst out laughing, causing the other two to chase them down the corridors.
Then Ellie would shake her head talking about how all of them are stupid, and Lexine would just say that they're just cute and funny while hearing them all shouting down the hallway.
In other words, I think it would've been amazing if they all met.