I noticed this issue back in October and assumed that it would be worked out with one of the dot releases. After a few frustrating months, I finally called Apple and told them that my Creative BT headphones are basically unusable for video (which is the only thing I use them for). I spoke to a second-tier tech, who had me submit diagnostic logs that he sent to Apple engineers. They determined the problem is with my headphones, which are "not compatible with Yosemite". It takes a lot of nerve to release an OS update that breaks many mainstream—and expensive—peripherals (Bang and Olufsen, Harman Kardon, Sony, Logitech, Creative), and to then turn around and blame the other companies who've done nothing wrong at all.
The Apple tech actually suggested to me that his Beats headphones work fine with Yosemite. Perhaps the reason Apple isn't rushing to fix this problem is that they want you to "upgrade" your headphones.