Well i dont think that reuniting old thrio again would be bad idea at all.Maybe they werent that great during Johto,but this doesnt mean that this same team would be boring if it ever reunites again in pokemon.You must also take in consideration that writers probably learned on their mistakes which they did through entire Johto saga,so if they ever decide to have group consisting of Ash,Misty and Brock again in this show,they would make sure to handle them well not doing the same mistakes which they did in past.LOL, no. The original team was boring during Johto, widly complained about in the fandom and bringing that up is just sad.
May was a hell of a lot more interesting than Misty was as a whole, and Contests are far more interesting than those mundane fillers we had to deal with in Johto.
If anything as this thread title suggests, Brock should have went the way of Misty at the end of AG.
This show needs new characters, not ones people are bored to tears with.
As for Misty,writers could easily come up with some plausible plot allowing her to leave the gym(this doesnt have to mean leaving the gym leader place permanently but for some period of time allowing her for example to make further progress in accomplishing her goal) giving her something to do keeping her interesting.This isnt really a problem,because possibillities are endless.
About May being more interesting than Misty,well that is a matter of personal preference.While i do agree that May was great character,to me Misty was simply much more interesting than her when she was part of the main cast.
I understand people who dont want this and i respect their opinion,but the thruth is that a lot of fans would like to see original team back for at least a season before the very end of pokemon series,and realistically speaking this could function.
p.s.I apologize for going little of topic.I just wanted to say my point of view on this idea.