Maybe that's because she doesn't have that big a part to play in the the MC's main story, or because there will be a more clean opportunity with her now that she's free and single.
The reason for not being able to get away from the M&J is likely because it's important to the story, whereas Sage's drama with Chad is not, hence why it can be largely skipped over.
I agree with you, and thats why I think the game needs more difference between paths (even if they are small ones)and more choices from the player. In the last episode the MC who was rejected is as willing to go with them as the MC that is in a relationship with them. For example, I wanted my MC to be late to meet them in the end because he was "busy".
However, this isnt new in the story, because in ep4 a FULL DIK MC (super confident, laid back and having sex with everybody) gets overly emotional, hurt and sensitive (a typical CHICK MC move) when M&J tell him the truth just to create drama.
In the next ep, Im really hoping for a way to choose to get away from the Dad/Maya dispute like I had a way not to get involved with Quinn and help her.
Point being, M&J are like Quinn: They advance the story that we "should" care about, and not the one we "want" to care about (depending on path)