Probably, Don. Not too many ceilings have a better fire rating than an equivalent amount of cement, mortar, joint compound, etc. And- with all those pipes passing through, so close to each other- the issue of bonding this patch to the ceiling is kind of moot!
Indeed, for most such penetrations, I suspect simply packing the spaces with fiberglass, then taping over, would probably pass the fire test.
I suppose that ultimately, its' an engineering call, based upon trade practices, comparison to specific ceiling designs, and the acceptance of the AHJ.
Not to be overlooked is the way the pipe itself will conduct heat through the wall, no matter how you seal it. There's only so much a patch can do.
