I'm impressed by the amount of progress the team has made in the past few months, KMD is definitely a pioneer of its own kind. The only issue I have are the notary nodes - I always have an issue whenever voting is involved in any platform. You are signifying trust at that point (which is the completely opposite of what the basis of bitcoin was meant to serve, a trust-less service), and if there were to be a group large enough it would essentially become somewhat centralized. We can see a clear example of this by looking at Lisk.

Lisk has let this issue run rampant and now they have to deal with hiring a full "science" team to amend the issue, this seems like a greater feat in itself (rather than the javascript protocol).

None the less it's not like centralization really matters in the cryptocurrency market. Even BTC has ended up being severely centralized and people still use it. It seems in the end people tend to care more of the application or use. If that ends up being the case KMD is in my opinion a sleeper.