I think the main problem lies with misinterpreting Pokemon's marketing potential. Pokemon has always been a kids show, but it doesn't need to be treated as such at every corner. You have to consider how to lengthen the average loyalty of the viewer, and the quality of the plot, dialogue, and characters determines that. By creating content merely equivalent to the general public's expectations of a "kids show", the show will fail to go much beyond that. When Pokemon anime begins efforts to actually exceed expectations again, then the dialogue will likely improve.
I am the current leader of Save Our Voice Actors, a Pokemon fan group supporting the voice actors in the anime dubbed by 4Kids (seasons 1-8). Our goal is to provide The Pokemon Company international with encouraging feedback in support of returning the main cast members. If you're interested, please visit us at facebook.com/saveourvoiceactors