So I've asked this question a few times on other threads but haven't gotten any definitive addresses and I'm sure other people are wondering the same thing as me...
Okay well my big question is; if I start my Be a GM mode tomorrow with the new rosters when the XP patch comes out will it work for that Be a GM game? Or will i have to start a whole new BaGM for the patch to take affect? I'm itching to start planning the BaGM!

nobody could say for sure at this point, there's supposed to be a blog coming detailing the fixes....

BUT...in recent years, it's been fairly consistent across most EA titles that patches will work with franchises already in progress...

You'll need to start a new BAGM ...

Also, I don't know if anyone has noticed or not, but every leap year, some AHL teams do not have their 80th game count as, for whatever reason, the AHL season and NHL season end at the same time, even though the AHL team has games remaining.

I was GM of the Flyers and Adirondack needed to win their last game to get in in 2016. They won, but it never showed up in the stats as another team was already awarded that playoff spot.