Add seasonings such as tarragon, granulated garlic, and granulated onion. Add black pepper if desired to round out the flavor. All of these flavors will enhance the fish. If you want to kick it up, dip the fish in the egg wash, then the flour, then in your favorite hot sauce, the flour, then egg wash again, then in the breadcrumbs.
Another winning breaded mixture is to add shredded coconut to the panko bread crumbs.
For something a little different, cut the fillet into squares. Make a simple batter of 1/2 cup flour, 1/2 cup cornstarch, 1/2 tsp salt, 1 large, beaten egg, 2 tsp, baking powder, and 1 cup of milk, or soda water. Dredge the fish pieces into flour, then into the batter. Deep fry until golden brown for fish tempura. Serve with catsup that has been mixed with powdered mustard, and with plumb sauce.
Just a couple of ideas for you.
Seeeeeeya; Goodweed of the North