Jumping in: Yes, yes, Mai should've reconciled with the others or at least Jounouchi arrgh the dub cut him worrying about her in Grand Prix. But it was implied that she'd be back after she worked out all of her issues, and the very last bit in the end credits of the original had her dueling again, so she's obviously trying.

Sorry, I'm very fond of Mai and have to leap on any opening that presents itself. XD;;;