That's what Best Wishes does for me. They focus more on other things besides the battling, definitely not battling oriented like DP. I mean the Don Tournaments they spent more time with Bianca screwing around with Zorua in the first one then focusing on the actual battles.
They also short changed Marlon vs. Cameron since that battle was quick lived as well. They could have did more with that match.
I see the endorsement as a way to write her out of being the the XY saga. She now has a position as the Opelucid Gym, so she has commitments and cannot continue the journey with Ash.