Agreed. I think this needs to exist. FWIW, I own blockspace.io, and was thinking of using that to put up a site where people could "sign" to support, or oppose, larger block sizes. Core/BS keeps making statements about how they think the community is on their side, which seems like quite a delusion to me, so why not put it up for a public vote?
There's also
http://bitcoin.consider.it, which is pretty nice, though it doesn't force you to "verify" your ID from what I can tell.
So if we go ahead with a new site (or on BU.info), I think it'd be important to go the PGP and/or social "verification" route, perhaps where signatories must sign with *some* account (twitter, reddit, facebook, github, etc) that was created before Dec 31st 2015 or something... So then we can pretty confidently say we have real-user representation. Granted, I'm sure people will sign with existing sock-poppet accounts, but that's gonna happen on both sides (and they'd have to *already* exist), so I count that as a wash.
Thoughts? I could do the web-dev.