With Fading you get the best of both worlds if you want it and the satisfaction of knowing that you are controlling the situation and are befuddling their little power plays .
With Disassocating, you get to have your say and go down in a blaze of glory which would probably feel good, be more impressive and dramatic but I'm not a big fan of "burning bridges" unnecessarily. It's good to have options in life and be able to pick and choose your next move rather than have them cut off.