did you know now (at least for me) when u play offline with a friend on the same system you still level up that’s weird for me it didn’t do that before!!!
I have always gained XP offline. Just very slowly compared to online. like less than 1/3 of the points from playing on XBLive
Yeah,sure ! 
I’ve realized this before too.
Forge mode with you around 1100 xp in a ten minute match