>>528141551
>>528141678
It has to do with SURVEY_PROGRAM being structued the way it was with the intent of feeling like a standalone story that subverts the expectations of Undertale fans(Toby literally says this in an interview somewhere).
You have to remember at the time, the ending was a TWIST that you were only playing ch1 of a much bigger game. Susie's development didn't feel rushed back in 2018 because that was the entire game. Even with ch2 it spanned like 50% of the game so you didn't notice it very much. But now with ch3&4 it feels like she finished most of her arc at the very beginning of the game and sorta stagnates the rest of the time.
I think Susie, Kris and Ralsei interactions feel more organic in ch3&4 because they've been together for long enough that it makes sense they're all friends now. The main problem is her becoming genuine friends with them should've spanned ch1&2. Heck you could even squeeze in some more Suselle interactions in ch2, have Noelle be the reason why softens up or something.