People take this game way too seriously. Anyway, Maya and Josy main issue for me isn't design or the cheating part. Every girl there and you the MC do very shitty thing. Maya and Josy main issues is that they are what you call Basic Bitches.
They're mostly generic nice girls, who don't have very unique traits or personality, nothing distinctive that makes them interesting. They could be switched, we working together with Maya, and nothing would change. Which isn't how Sage, Bella or Jill roll. They need more things that make them distinctive, they need stronger personalities that appear more - they need to be more unique, and since ep 04 ends their railroad, I have big hopes.
Maya is a feminist and all but lesbian (with mono target bisexuality apparently) and Josy is a daddy girl (despite the fight) that is super chatty and chipper. Reinforce that. Have them be more active, have them be less reactive to what others do and have lives outside that are interesting. Make their sexuality more present. Swap stories. Have Josy be fun, and Maya have dialogues that are interesting like Jade. Have them have interests that are put into practice.
So yeah, the issue is that they're basic, with their only real interesting thing about them trope wise being each other. Sage, Jill, and Bella all have their moments of uniqueness and character, while Maya and Josy can both be summed up with basic descriptions. They need something to really pop. As I had said, the lack of railroad and them planning to cheat and possible quinn confrontation is promising.