> The surface of the event horizon in such a scenario seems to me to be quite
> complex. Aside from tidal forces of rotation, which breaks the spherical
> geometry of the surface and creates complex mixing patterns, there should
> be peaks and valleys at the surface due to the underlying distribution of
> matter inside the black hole and due to quantum fluctuations.
I don't think you realize quite how weird things get close to a whole. Inside
the light orbit radius (the point at which light orbits the hole) orbiting
the hole makes you fall in *faster*. So tidal forces of rotation *smooth* the
black hole.
Also, there is no distribution of matter inside a black hole, at least as
far as an observer outside is concerned. Even for an observer inside (if
such is even possible) much of the hole is unobservable and hence irrelevant.