Coinbase delays by like... a week though. So a minor delay on price data is still better than the status-quo. We need more BTC exchanges to open up and compete against each other.
That's not really true for Coinbase Exchange, which is real-time. You don't need to wait for a week, just buy/sell at the spot price. No pricing delays, no "market maker prices", which was rightly pointed out by the OP to be front-running and no other gimmicks. Also, no Singapore arbitration.
Coinbase delays by like... a week though. So a minor delay on price data is still better than the status-quo. We need more BTC exchanges to open up and compete against each other.