I received my pro PBPs back from Apple. No change. Even though I have well documented the issues, all they run is a quick diagnostics without even looking at the ticket. I reported the microphone is cutting out. The standard diagnostic paper they put back in the box doesn't even say they tested the microphones. They were very efficient with the process of shipping me the box, and turning it around so I'm sure how they measure themselves for metrics looks fantanstic. But they do not survey the customer afterwards to ask how the customer feels about the service that was supposedly performed, and whether their issue was actually addressed. Wrong metrics.
I'm very disappointed in Apple's support of their product, their poor processes, and lack of product quality in what they shipped with the PBPs. I don't recommend anyone purchase PBPs given the issues. The Powerbeats 3 on the other hand have worked flawlessly. It's hard to understand how you can have a successful product with the software issues worked out and then drop backwards so far with the newer product. I guess that's what happens when you develop with completely different teams.
I did do some additional troubleshooting and determined my microphone issue is related to only my right earbud. When your PBRs are paired to your iOS device, you can go to Settings->Bluetooth->PBR (whatever yours are called)->Microphone and then switch it from "Automatically Switch" to either "Always Left" or "Always Right". Call someone and switch it back and forth while on the call, talking. Have the other person report on the sound quality of each microphone. I think this is why my microphone was intermittent, because the device was automatically picking which microphone based upon its algorithm. I do put the earbuds in my ear in different orders, and sometimes only use one or the other.
If Apple had tested my microphones, they would have seen/heard the difference.