Indeed. I think that most design inclined members of the community happen to be wizard players who aren't very sensitive to sorcerer players wants and needs.
Well I'm glad you mentioned it as I didn't want to be first. But Skip Williams didn't want sorcerers at all. And the 5e team last minute rushed the class. And the bunch of 4e haters were wizard players.
So I suspect some part of the problem is D&D wizard players who didn't want anyone but Intelligence based, spellbook owning, wizard in robes to be a good arcanist. So sorcerer kits and sorcerer classes are always half done.