In a nutshell I like proof-of-work fine, but like anything it needs to be implemented fairly carefully to optimize it's usefulness.
Here you go again making very vague statements. You did answer my question from the other thread and in that other thread you won't pin down a clear answer either. Don't change the subject with non-PoW social engineering schemes.
but like anything it needs to be implemented fairly
It was announced in a white paper long before its public release and is open source. That's about as fair as you can get in the real world. It's usefulness is upgraded through an open source system. Anyone that has the best scientific research to achieve peer-reviewed consensus contributes to the optimization of usefulness.