There are alot that haven't been solved.
As was mentioned, scalability and ease of use.

And lets be honest, finding a non-speculative use for the blockchain.

I believe the ban is a good thing. It will require more ICOs to build first (or partially build) before seeking to raise money. It's something we are currently doing.

$10? for a whole blockchain? i don't even think forking an existing code would be that cheap.