But in Airblue situation I believe captain was under so high stress and frustration while turning heading knob so even such feature wouldn't help him to realize the picture IMHO
On the contrary, it would in all probability have saved them. The reason they clobbered the hill was because the aircraft turned right initially because that was the shortest way to the final position of the heading bug. If it had turned left when HDG was selected, the direction in which the heading bug had been turned, they probably would have missed the hill.