Only just found out about the 14.16 update allowing Roams to be able to stay stereo paired when being used with Bluetooth (while at home and on a Wi-Fi connection at least). 

Been testing it out today as I have 2 of the coloured Roams in my kitchen which are used to BT from the PC and my phone. Yes before, I could group them but could not stereo pair them as a long term thing without constantly re-pairing them again and again.

Nice that I can stereo pair them now and also use them how I used to. But now of course, I can play tunes via Wi-Fi when not being used with  BT.

Happy about this!