to be honest, as someone who's a Kalos STAN (yes we exist!!), there are times when I miss the old style
but tbh I've always been in favor of the new style. It really assists in telling the story of Sun/Moon, and gives a more comfy, laid back, 'out in the sun playing on the beach' vibe. Alola is much more comfier than the other regions in my opinion so I'll always stand by the art style choice being one of the greatest decisions they made for the series. I will be honest though, I'm not sure why it was chosen for the 2019 series, but I don't exactly hate it. Ironically you'll find it's more of a hybrid between the old and new style