if we are going to get a big late moment where the Mc decides who he wants to be with I certainly can’t see why you couldn’t necessarily open the field for a few select side girl Mc endings. After 16 episodes unless they drop off the map you are going to have spent a lot of time with them even if it’s not the amount of a main li path.
I don't know if I understand exactly what you mean
the endings will potentially all be there, DPC will have to work on each of them, so seeing them all at the end of the game (one positive and 4-5 negative) is certainly possible.
with negative I am generalizing and I mean without MC, negative for MC (for example Maya and Josy together is not an absolute negative ending)
we exclude, for optimism, that none of the LI will disappear prematurely
so I agree with you, in theory in the finale we will see what happened to each LI. (I would not assume that the fate of some LI we see before, maybe even in the penultimate chapter once it is "official" that MC is out of the game)
but of course the most important ending of every single game will be the positive one for MC, the one that will be given more space.
nothing prevents the ending from being happy for MC and happy for everyone, but given the premises I see it unlikely