Why didn't Dawn get a character redesign?

If Brock got a special episode after three years I don't see why Dawn can't have one. And I doubt Clemont and Bonnie will get a special episode but I think Serena will get a few, maybe Dawn gets to make an appearance in at least one of them, like how Brock was in a Cilan special. Only time will tell.

AFAIK it still doesn't quite invalidate my theory. Dawn and Serena are set up to be the only endgame girls for Ash. The Alolan girls? I doubt it, the show is likely to ship the trial captains with each other and Lillie either has ties to Ultra Beasts or is an Ultra Beast herself.

Given the atmosphere and tone of Alola, it starts out bright and sunny but then turns darker. Maybe each episode seems episodic but tie into the bigger plot. With the whole Aether Foundation being evil and Team Skull becoming good at the end. And also the Ultra Beasts and controversial experiments like Type Null.

I just have a strong feeling that Brock would be making a cameo or a recurring character in the future.

Dawn visited almost every region except Kalos. She probably stopped by in Kanto because of implications. Serena only has been to Kanto and Kalos. I think they have plans for both of them in the future but not in Alola.