I'd be up for it. However, from previous times this came up on various places I can tell you that the majority of people probably wouldn't like it. The sets and Haedrig's Gift guides people towards their "meta builds" and lets them avoid having to think about choices and skills. Despite constant cries for "balance, variety, freedom" I think that actually a lot of people rather *want* to have no freedom - this is indicated by the race to establish metas and the inertia in shying away from it.
I do my own "non-Haedrig" run every once in a while, by playing up HC (after I've grabbed Haedrig on SC). One season we went to the extreme: me and a friend got a powerlevel on HC to 70, but then started to "play up". It's actually really fun (and challenging) to get ANY gear when you're level 70 and naked! Just getting into Torment 1 took us a while (especially since it's HC - you can't just do chest runs), and it took us a few hours before we had our set complete. Most fun I've had in a while, but you need to really think about skills+items you get and add some math to the mix. Definitely not for everyone.
Btw, Blizzard doesn't like votes/petitions, so that's not gonna happen
Yeah if you take away the fact you can trade in Grim Dawn and Path of Exile to easily obtain high-level gear -- it's incredibly difficult to put together full sets of gear in those games on just drops. At the other end of the spectrum, we have our beloved D3 where you have Headrig's gift which can be obtained in a day or two, plus greens and oranges rain from the sky at high T levels. Somewhere there is a happy medium. I'd like to be able to craft set items or make Headrig's gift a low-level set that would be appropriate for farming at the start of a season. Have high-level set recipes drop at the same rate as potions or Ramaladmi's gift.