ShoPro should have replace Ash after his run at the Orange League; but they didn't, and thus he's stuck in the show FOREVER!!!!I totally agree. While I understand the reasoning behind why people would like for Ash to be replaced with another main character, I also think that it is pretty clear that Ash is sticking around for the long haul. He's been around for thirteen years and by the time the new series, Best Wishes, end, Ash would be the main character for roughly seventeen years. That's pretty clear evidence to me that he's staying as the main character. If the writers really wanted to replace him, I think that they would have done so by now. Considering how popular the series is and it still does its job of advertising the newest games well enough, I don't think that the writers have any incentive to actually replace Ash.
Besides, the show is about his journey. I believe that was establish with the first episode. I still find Ash an enjoyable character myself. I'm glad that he's more mature in AG and DP than he was in the original series and he has also become a much better trainer. I like him, although I can understand why others find him dull, but it's pretty clear that he's here to stay.