He replaced Keith moon first on Face Dances, and you’re right, he is nothing more than a metronome.

Keith Moon was a one-of-a-kind drummer. He pushed the drums up from the background to a first-order instrument. He didn’t keep time and didn’t maintain a steady beat.

I recently started teaching myself drums and when I listened carefully to Keith Moon, he doesn’t maintain any semblance of repeatable beat. But it’s beautiful and intimidating and ferocious. I wonder why others haven’t tried to imitate him because it’s so much more interesting than a regular drummer.