I might need to watch the XY064 dub sometime and hear Scottie's voice so I can see why people are hating on it so much. But yeah, giving kid-aged characters voices that sound older than they are has been becoming a trend in Pokemon lately.
Can't wait to see your opinion on XY064 dub soon... especially the fact the DreamDream theme that got played during Fennekin's evolution scene got replaced with generic dub-only music which was pretty expected. And as we both expected, they used Ariana for Aria's alternate alias in the episode.
I don't play spinoffs but I will feel for those who do want to avoid spoilers. Still, it's so bad that we're going back to region-by-region releases which I think feels irrelevant in 6th Gen especially after those recent games to get worldwide releases.