One big issue with that distributed and anonymous voting system is:

Who is gonna enforce the outcome? Actually, nobody.

A great politician once said: Never make rule you cannot enforce.

So, this voting system only for gathering opinions.

UNLESS

The Nxt client is distributed via Nxt itself. Then, changes (aka pull requests on https://github.com/) to the client can be voted on by the community. That would be real democracy.

I only fear that's gonna be very technical for most users.