As a tie, in which case you go to points defferencial (in these 3 matches).
I agree that ignoring the head to head score is not too logical.
Even if you decide that points difference should be considered the main parameter, surely, the head to head score should be more important than the total ammount of points you have, (which depends not only on your quality but on your tactical preferences).
Still, I understand that according to the current parameters, calculations are much easier, and the needed algorithm is much simpler, and since currently, in most cases there is no falsification, the change of parameters is not too necessary, or urgent