Poe wasn’t ever that character trope in TFA... He was basically turned into that in TLJ so that he could then be taught a lesson, so kinda pointless.
Likewise, Rose was pretty much teaching Finn valuable lessons that he didn’t really need to learn...he was already a slave of the first order, he didn’t need rose to tell him about. Don’t get me wrong, rose was a fine enough character in and of herself, but alot of what she was there for was rather pointless.