I’m speaking for myself here, and not in any way should my position be seen to reflect the opinion of the ECC.
I think that you could publish whatever goal posts you wish, and the resulting system would still be manipulable by adversaries who are willing to launch sybil attacks or borrow coins to attempt to influence the outcome of the poll. Given that, I see this polling as more of a curiosity or experiment than something that can produce real actionable information. I felt the same way about the recent ZCAP poll, for different reasons.
That being said, I think that it’s not an entirely useless experiment: it can tell us what number of coins an engaged subset of the community are willing to take the effort to reveal in order to make their voices heard. That’s an interesting baseline statistic to gather. Unfortunately I don’t think that this poll can reliably determine much more than that, but the idea of coin-weighted governance is one that is being broadly explored in the cryptocurrency ecosystem, and I think it’s worthwhile to keep doing periodic experiments on this front within the Zcash community.
Along those lines, I do think that in the slightly-more-distant future, coin-weighted polling could be improved to the point of usefulness. In particular, if Zcash switches over to a proof-of-stake consensus model, something that’s very interesting to me is having the weight factor be a function of both amount and the duration for which that amount has been staked, as this could address some threat models (for example, that could make borrowing coins to vote a relatively difficult/expensive attack strategy).
Finally, I’d like to point to a form of coin-weighted voting that the Zcash community could choose to invest in more heavily, which is the Gitcoin quadratic funding model. Those folks are doing serious work on sybil resistance, and have already done a fair amount of work to integrate Zcash into their funding stack. I really hope that ZOMG in particular chooses in the future to disburse some of their funding via grants. For the purpose of helping inform the direction chosen by ECC and the ZF, perhaps an approach we could try is to use a Gitcoin grant round to raise funds for a charitable cause - say a donation to Coin Center or something of the sort - where the different options that people could “vote” on with their donations are the different options that would otherwise be presented in a poll like the one we’re discussing here.
Coin-weighted voting using Zcash is interesting and something we should continue to explore, but that doesn’t mean we have to implement it all ourselves, and we should be very circumspect in the authority we ascribe to the result of one of these polls until many of the issues are able to be addressed. That doesn’t mean we shouldn’t do them, of course - just that we should interpret the results in full recognition of the obvious limitations of the current method. And as the tools we have improve, maybe we can make it good enough so that we can, as a community, take whatever results we get more seriously.