Having watched about 200 episodes in a row spanning pretty muh all the arcs these past few months, I feel I've gained a bit of perspective on why a lot of people dropped off the anime after season 8, and I don't think it was just the new dub team: Really, it started on the tailend of season 8 (which was still done by 4Kids), when Ash and co. set out for the Battle Frontier. The Battle Frontier arc and DP stuff are really similar to the Hoenn stuff in structure, except for Team Rocket. TR visited TRHQ after the Hoenn League, and basically decided they wanted to change their image. How do they do that? No, not just a new motto, by incorporating a lot of humor that I'd assume is lost to those outside of Japan. Incessant and unfulfilling rhymes upon rhymes upon rhymes. Really odd stuff in Snowpoint City where Jessie just says the same word for about 20 seconds while moving her giant head. Just, stuff like that. Someone well versed in the non-dubbed anime would probably tell me the new dub team just doesn't do a good job or that the writing in general isn't great, but I still think there's something to this TR stuff. So what does BW do? Bam, let's get rid of this new TR and make them the cool, occasional bad guys that hardly use any humor. Really, for the western audience where most of this humor was being lost (imo), I feel that was a brilliant decision. And then bam, let's just speed up the pace of Ash's gym badges and make anything in between feel worthwhile, either by doing big tournaments, evolutions galore, side character interactions, or general fun stuff like the Bouffalant episode. I really, really dig it, and feel it shouldn't be piled in with DP in what was an odd time for the anime with its odder humor.