Maybe it's just me ... when I am "engaged" ... I see nothing but the plane(s) and colors (red and green)... I don't rely on icons to tell me what plane I am engaged with, nor do I use/see the distance display. I spend all my energies on watching the wing movement of who I am engaged with and if I were to look at the icon information, I could miss the beginning of an evasive which in turn could cost me the fight.
YMMV.