I would to ask you, what is the reason that make you still use coinbase? is there no substitute for it?
in my opinion, bitpay could replace its payment, lakebtc kraken bitstamp could replace its exchange.
The best exchange right now is BTC-e. They have been around for more than 4 years now, and they were never hacked during this entire time period. They require no verification, and they will never provide any user info to the United States government agencies.
Their volume is still low for an exchange that aspires to be the best.
There have to be more places to buy Bitcoin or we'll have more Goxes. The exchanges can't be the only source, not all people are traders and we can't expect the whole society to access exchanges every time they need some coins for daily use. Localbitcoins is great, but we need more alternatives.