I agree completely. The same for activating it. No ding when you do cruise control but its quite loud when you activate and deactivate autopilot.
By the way, is there a difference in the stalk detents when engaging cruise? To engage cruise all I do is press the stalk down once, just before the "autopilot detent". To engage autopilot you have to to the detent, 2 times. Is there a function of hitting the detent once?