Dude, I give it to you man for being persistent
I do run using RUNGpS and love it ,and I do NOT use a2dp while running, I just use wires, I gues I am just used to it and have it working perfectly.
I do listen to music using BT wireless stereo headset, and I do not experience any cutting out as I do know what it is.
Why TCPMP! JUST wondering!! Nitrogene is very light, some 500kb, free and good .Try it out.
I also recommend using SKtool as it lets you maipulates pool,bt SETTINgs basically.
Enjoy man, People that run live life...