For all I care this topic can be used further for this game mode. I would just like to ask whether anybody has figured out how to use custom rosters? The Y button prompt at the lower end of the screen is gone and I haven't found a possibility to use custom rosters in MyGM. There seems to be absolutely no button for that. If they took it out I will go absolutely bonkers because this is the mode I have been playing on for several iterations of the game now and they fucked it up because they needed to add some shitty story to it.
Just in case: If any modder could figure out how to "override" the day 1 roster for MyGM and allow you to replace it with a custom roster that would be ace. I guess they removed it so there shitty "story" mode in MyGM would be even grindier.