I can't see how you can pitch josy as 'running straight to Maya'.
On the second date with Josy when you ask her about getting into B&R she says "If I had I would be outside your dorm jumping for joy"
Then when it happens it's MC she phones, It's the MC she wants to stay with and she merely gets alloted a random dorm that just happens (for story purposes) to be Maya's.
Even then she scarpers out to the Toilet, texts MC and during that talk she curses the odds and asks "what are we gonna do"
I'd say that all her talk and action up to this point have her wanting to pursue the MC over Maya and it's only when MC storms out that she falls back in with Maya.
Even then she's the first to try to mend the bridge via text and later on (if you take the path of friends/meet dad/luggage) she pretty much admits to not wanting to be the odd one out and ending up with no-one and not having a choice in the matter.
Maya's opposite scene (not helping with luggage) is a lot more constrained and is just that she doesn't want to deal with the complication that is the MC. therefore I'd say the path to a Josy only path is a lot more viable based on the writing and timeframes then it is for a Maya only route
Josy with MC is completely honest
she always told him that she was engaged, MC is an affair, and MC knows it, in fact towards Josy he only says nonsense, he is afraid, there is little to do
the story with MC is clearly over as soon as she arrives in Maya's room, they write to each other, they talk about each other but nobody talks about their relationship. it's over. when Josy talks about "we" she refers to the three of them, not to them 2
once they are all 3 in BR there is no moment when it is credible that MC has a chance to continue his story with one of the two girls.
why otherwise after the clarification "we are all cheaters" are the two girls officially a couple while MC has to beg for a friendship that does not exist?
on the hypothesis that it might be easier to reconquer Josy of Maya I agree, but it's a different matter