There are still many problems in crypto:
- This year we had many HARD FORKS.
- high transaction costs ($40,- btc)
- transaction speed
- realy decentralized? Who are the big players, who decides the hard forks..
- almost all crypto needs to be payed with btc
- ICOs - to much greedy and some good projects
We arent there yet. But these problems wil be solved

Maybe in 2018..
The transaction speed is one thing that most projects stumble with.
I think that most developers need to work with the timing of their updates, some state that they will get something at a certain time and they don't.