I'm skeptical that any of these pos coins will ever work out.
The argument for PoS is flawed. The miner centralization issue is not as cut and dry as it is made to appear. If a pool doesn't manage its imagined power responsibly the miners will flee quite quickly. The security is really maintained by thousands, not 5 or 6 entities as proposed by PoS advocates. And these are thousands who know where their responsibility lie. That someone owns a lot of coins of something doesn't mean that he/she is dedicated to maintaining the networks integrity. Not to mention the risk of the network being hijacked by a large entity in a price slump. If you need physical HW in place at least you know there is a physical limit to how quickly/cheaply power can shift.