Honestly I was very happy with how our DM handled the Marines. We'd sort of worried he'd wind up making them either too comedic and grimdark.

Glad you liked the fungus btw, that was a fun little flashback mission. Our DM has left all Nubby & co.'s shenanigans up to the imagination, so he can retroactively decide what happened when he needs something for the plot. In the middle of that bridge scene he had us all roll Knowledge:This Crazy-ass Ship, then suddenly shifted the setting. Very cool thing. He gets more mileage out of that trick in the future chapters.