Exactly blockchain doesn't servers any purpose if its used in a centralized way. What I would like to see is smart contracts being run on a public controlled blockchain. That IMO will be a true "Free and Fair" election. Something like Ethereum where power isn't distributed to a few but rather to many. If they don't, it's just like replacing the current database with a newer one. We are still very far from having 'Decentralized' elections. The governments are not ready to trust the people who are running the network, yet...