Biology 101 says if you freeze anything you're pretty sure of killing it.
I see that you have Dr. in your name, but I don’t think that’s true. Freezing renders bacteria inactive, but it reactivates when thawed.
I feed pellets with a feeder twice per day, I feed a lot of nori every evening, I feed frozen when I’m feeling ambitious, and once per week the tank gets a feast when I feed my eel 5 big shrimp and the fish inevitably get some of that.
My tank is big and I have big dirty fish that aren’t Typically kept in an SPS tank. I feed mostly dry food because it seams cleaner, but My logic could be flawed on that.