I'm using bitpay myself. I have a coinbase account, but their fees are way high. Higher than bitpays even.
While I have had long delays with bitpay, I've had those same delays with coinbase as well. Really it's the bitcoin network lag that's killing itself.
Bitcoin is currently a choke point for the translation of the crypto markets into the rest of the economy. We shall see how long this lasts.
The market is there. The demand is there. It's already begun. Bitcoin must keep up or be replaced. There is no other option.
I vote heavily in favor of replacement. What's got a strong enough backend to handle that kind of traffic though?