Nasty. Yes ;)
I'm sorry but it solves these problems and I think most of us have more prominent issues. Bluetooth - and even overpriced Apple products - are usually working well with one connection only. And the headset profile needs to sacrifice quality for voice input. This is to large degrees a question about priority of the user. If you need good or even excellent quality - opt for a good headset and a jack.
Yes. Some issues can be solved with higher priorities by Apple. Or Apple doesn't care because it is good enough. Maybe Apple need an argument for another bad proprietary protocol to make things worse. I would be happy if I can switch my mouse from Logitech (Bluetooth) between two laptops with coupling them entirely again.