Worst come to worst - you fork POW to POS/POI/whatever, and don't rely on miners anymore at all, that's true for both, all pow coins really. Miners are here to protect network, not to dictate how much whatever-coin is worth or whether it's viable or not.
The only thing as a coin developer you should care about - are your customers. Your reputation is secondary however, but ideally you should be clear, honest and accountable.
you are being harsh, that coin replaced POW with POE - proof of exchange, as it only exist on a certain exchanges, but I expect every exchange to fork it even further as there are no transactions between them, such a green coin!