Without mining, there will be no way for people with little or no Nyan to get any without spending money. Without lower rewards and/or PoS, there is just too much supply.

The vote is pretty much tied, and honestly extra accounts could have been created or used to get it to swing a few votes one way or the next.

Thinking of one other notable point of PoS, people could earn Nyan while mining other coins. This could be a good thing, or a bad thing, depending on how much they get into their other coins and how much PoS pays out.

I think hybrid is the right way to go it seems, imo. It may be more work, but ensures Nyan will have staying power. After that, it's only a matter of building a marketplace.