I would also like to report that mpc-hc 64-bit has no rule. As far as I can remember, rules pack only has the 32-bit because it would say that mpc-hc is not present, although it is, just 64-bit. I don't know the rules for mpc-hc 32-bit, and so I can't make a wise decision about its settings for 64-bit.
That said, I would request that mpc-hc 64-bit be made a rule, and that the rules pack be readily made available to read for re-evaluation by the user afterwards.