From my perspective, I always configure broadcast suppression since most modern enterprise applications are unicast-only, so I do not see it often. If someone says that their wireless was good and then it got bad, that is the first thing that I do. If it is affecting clients, no matter what band, that is a strong sign it is NOT interference, but contention.
The TAC method you show of applying bcmc optimization(to drop broadcasts) and then showing what is policied is a very good way.
Others may want to comment on what they do, as well.