IS the movement of the fish natural? It seems to float up like a bubble and then has to struggle to get down.
Most of the fancy goldfish I've seen do look like they are struggling to stay afloat. They are almost always swimming. Not quite as much tail shaking (though there is a lot of that), but almost constant, steady tail movement. They always seem to be annoying the other more laid back fish in the tank.
It may help GA to have at least one less ornate fish in the tank that swims more like a normal fish. It would help add a little diversity.