If this doesn't fix the damn "audio quality goes to 10kbps if you also want a mic" I'm going to electrocute the devs responsible with the voltage common BT devices running this stack require.
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Same goes for A2DP with a remotely decent compression algorithm which doesn't sound like crap
I'm cynical enough to believe that these obvious huge missing parts of standard Bluetooth aren't accidental. They've surely noticed.
Up until the 2000s, industry standardization groups were formed by companies which acknowledged that they need to team up and cooperate with each other to establish a mutual standard across several market-segments.
Nowadays we have companies who participate in those standards but don't contribute their work back to it, in hopes to secure a competitive advantage with a closed ecosystem.
What happens instead, is that they force other equally-large players to develop another proprietary standard to match them, and now the standards body is unable to find common ground between all members anymore.
Apple is the most egregious example of this, extending the Bluetooth spec in proprietary ways and not contributing any substantial implementation of it back to the standard (proprietary fast-pairing, linking BT-pairing to the Apple-ID instead of the device,...)
In today's times, Bluetooth wouldn't even be a standard. There would likely be equivalent wireless specs from Apple, Google/Qualcomm and Microsoft/Intel, none of them would work properly with each other because each team has its own set of accessories to sell...