Ok so after playing through the entirety of it and knowing by the sudden jump to the title screen that there's no way a transfer of save data was possible...
I also looked at the Dance CGs and figured out there are technically 6 current "Girlfriends" possible (but even after getting done with Pyrrha's fourth event she wasn't on my list for some reason).
My take away is this: It is not worth me going back to my saves through that MASSIVE ending to establish any kind of save for any of the other romance routes. Because they A. Did not affect the ending. and B. Are not going to transfer over to JPDE2.
My only guess is that you'll get some sort of choice at the beginning of 2 that asks who you romanced and it'll change how the sequel plays out. Or there'll be none of that and it will be ignored outright as non-canon.
Also for the love God can I finally get with Jack in the sequel? I haven't been this pissed about a game walling off a character since I first played Doki Doki Literature Club and was pissed that Monika wasn't available from the start... didn't even mind getting trapped in an eternity alone with her.... Jack is hands down the best girl and meh.... Let's just say I hate forced girlfriend routes, nothing against Evelyn. If it had been a choice I would have cared about her and Penny more. NOT having any choice with Jack leaves bad taste in my mouth.
Edit: knowing how the RWBY version of things ended after the Fall of Beacon, why did it seem to imply that the rwby team members (other than your date) are dead? The dev wouldn't be stupid enough to kill them off, right?