Editors can be both a good and a bad thing. Without editors, Toriyama would have reportedly stopped Dragonball after the Pilaf saga - no Krillin, no Tenkaichi Budokai, no Red Ribbon etc.
His editors are also the reason we got Androids #17, #18 and Cell, he was originally only going to do Gero + 19.

Buuuuuut... his editors are also the reason Gohan was wasted after the Cell Saga, and they're behind a lot of the problems that showed up in the Buu saga too. They also initially were against Goku growing up in the first place.

So I don't think it can ever be as simple as "editors good" / "editors bad." Like with any creative endeavor, too much influence on one end of the scale and the whole thing tips over.