Personally, no. I wouldn't at all be surprised to find that the chosen branch of the four "named" paths is the one that you take to the end of the game, potentially unless you fuck it up and the girl(s) dump you. Zoey might be an exception to this though (as in you can leave the path for Zoey and only Zoey). I also think that if you are on the "Others" path, that is the same case - you only have "Other" girls available, so none of the five MGs will be available at any point, even if Maya and Josy split (which I don't see as a foregone conclusion).
Too much moving around on and off paths at this point is far too messy in terms of the actual development of the game, although that may not be the deterrent it probably should be, meaning all of the above is probably completely wrong!