Yeah it's kinda strange how lacking SM is in non-Ash chemistries despite him actually being in an already established group this time. We have odd bits but rarely enough to validate them being friends long before Ash came along.
I also kinda hope they have more outer team Pokemon chemistries. While SM was good with maintaining Pokemon interactions, only Pikachu and Togedemaru had a consistent chemistry outside their own group, the rest just sort of acknowledged each other or had one-off dynamics that never really lasted beyond one episode. XY at least had Clemont and Serena's teams bond heavily (at least until some of them evolved, which was the bigger downside of characterisation that series).
I also kinda hope they have more outer team Pokemon chemistries. While SM was good with maintaining Pokemon interactions, only Pikachu and Togedemaru had a consistent chemistry outside their own group, the rest just sort of acknowledged each other or had one-off dynamics that never really lasted beyond one episode. XY at least had Clemont and Serena's teams bond heavily (at least until some of them evolved, which was the bigger downside of characterisation that series).