I have been and remain strongly in favor of NEOS including POS. I'm not presuming purely POS, haven't evaluated that specific option, but it's clear to me that POW is anything but the future -- it simply costs too much! Energy is at a premium and that premium will only continue to grow! The result of POW becoming unaffordable is that blockchain maintenance will become more and more centralized, something that's hardly good for the crypto community.
I admit to some collecting of certain other coins that have crazy built in POS inflation (drives down coin price). But there are more rational examples that provide much more sensible rates, neighborhood of 5% per annum non-compounded (next to no electricity cost, no halving concern). This is accumulation that doesn't require special hardware, your wallet CPU is sufficient. Doesn't require farms on Iceland -- that's POW! I pay 14.5 cts/KWH and that's one serious bitch with POW (I understand in Europe it's often much worse).
Yes, I strongly support NEOS with POS, whether it should be exclusively POS, I'm not sure! BTCD is exclusively POS and likewise XPY, whereas PEER and eMark are both, however, I don't see a particular problem with going POS exclusive. We have the multipool and so people are still able to aim miners and achieve coin! (It's necessary to have an existing stable coin holding in order to mine via POS!)
An argument against a super high rate of return is the tendency to hoard, better a balancing act between the desire to use the coin and the desire to achieve a return. Best practice may be to divide one's wallet between coins for staking and coins for spending. Critical difference from POW being the electricity cost is near enough eliminated and so participation is easier! POW is shrinking the mining community, whereas POS can expand it again! Likewise, POS provides an incentive to hold coins for a tangible return! I see these as good things.
PS. Further thought, I really don't see a clear need to remove POW, it provides another option.