People have a lot of really stupid preconceptions about Dragonball. Everyone should do themselves a favor and just read the manga without any pre-conceived notions about how much it sucks or how stupid it is or how it's just "fight fight fight" and it's the exact same fight every time.
I mean, Oda, Kishimoto, Kubo, they all cite Dragonball as inspiration. I mean, it must be good if nearly ALL of the new-gen mangaka are completely madly in love with it.
Also, Toriyama didn't let the fans write the Buu saga. Not at all. Fans don't really have THAT much say in the matter, it really comes down to Toriyama's editor and the people at shueisha. They're the ones who probably thought it was better that Goku came back, and thought it was better that Buu transform, etc. etc.
It happens to every mangaka. Hell, it's probably happened to Oda a few times as well. "Well, Oda-san, I don't think it would be in the best interests of this light-hearted manga to let someone such as pell die for good". You know, things like that, they happen to every manga author. That's why they have editors.