Bottom-line: I guess my current stance is that people are mistaken when they think the hashpower of miners influences outcomes of such a governance question. But they are actually right in a way, because miners have an economic incentive and economic incentives do influence such decisions.
The hashpower of ASIC miners is greater than that of GPU miners because of more efficient technology, but the upside economic incentives — how much they stand to gain — are equivalent independent of the technology. However the downside — how much they stand to lose — is greater for ASIC miners since they have fewer alternative uses of their hardware. (This would change if there were another coin that were more valuable that used Equihash-200,9, but I don’t expect that to happen.)
Finally and crucially there is the issue of decentralization of the economic interest. Currently GPU miners are numerous and ASIC miners are few. If that changes and a lot of people buy ASIC miners, then I guess we can expect more and more voices in here arguing vigorously for protection of their economic interests.
Finally an even more fundamental fact: the economic power of another faction can cause the creation of a new branch of the blockchain even if you don’t approve of that branch, but it cannot force you to stop using your preferred branch of the blockchain! As Nathan Wilcox said just before the initial launch of the Zcash blockchain: “It’s all opt-in.”