I think one thing bluetooth desperately needs is a programmatic way to tell the device: "okay, I know that whoever built this is very proud of all their ADVANCED AI AUDIO PROCESSING but listen to me: turn all of that off, and give me the raw audio signal"

like for BT audio the list of improvements that would be genuinely amazing are:
1) fullduplex fullband audio by default and banish the "communications profile" to the shadow realm
2) let programs turn off the maximum viable amount of "on device" processing

and everything else is basically whatever. "spatial audio" whoooo gives a shiiiit we're failing on devices consistently working reliably when you make a call