I have never had a microphone problem with a bluetooth headset. They all always just work until something mechanical breaks through use.
If I had an issue, wired headphones seem a simpler solution than changing the bluetooth standard and more likely to work than wishing manufacturers changed their devices.
So, the standard defines behavior that is obviously pathological, actively working against the needs of all users. But because it's already codified, it's a bad idea to change it?