You've made a great case for NEM here. I had watched a video or two on it and failed to see how it stood apart but "Importance" being measured by the diversity of transactions is actually something which I've called for having at steemit (a users upvotes decreasing in value when repeatedly voting for the same few users, increasing in value when voting for a variety of users). If there is nothing implemented to improve the distribution of wealth, it keeps becoming more and more skewed. I'm not sure how much of a difference this makes but it's definitely a step in the right direction.