You can pretty much tell people like to spout "depth and development" while being ignorant about it.
The irony is that Ash did develop and gets his character changed. OS Ash =/= AG Ash =/= DP Ash =/= XY Ash.
Now the problem is that most recent anime viewings are probably BW Ash, and there's a reason people loathe that season. It reverted Ash into his OS self without the snark. With that in mind, people assume Ash never changed even if he was a veteran in AG to a stylized training DP, and in XY he's the big brother.
Let akira toriyama direct write and otherwise have full control over it, every pokemon that can mega evolve would become the mains of every major character and only the mega can do the important stuff by the end however it won't be enough so we'll get pokefusion, awesome right?? Also the characters would be a lot more bada**
Official Canadian Of GameFAQs's............................EH! "I am hilarious and you will quote everything I say"- TFS Nappa