Honestly half of the experience of Howlin Rays is walking past the 50-75 people waiting in line and just walking up to the counter to pick up your pre-ordered food. And trying to explain to your kids what that smell is in the air and if its legal to drink beer while waiting on line.
Fast passes have been redeemable for a few months now. You just have to email them, and they can set you up with a pickup time. Not quite the same as being able to skip a 2+ hour line, but the food is as delicious as before. Though, I will say, I found the spice levels to be toned down a bit.