No, I don't think this is a flaw in the system. Its the mistake of the teams that didn't choose you. If your robot was as good as you say it is, they should have had you on their list even though you were in the top eight. In scouting we include everybody above us in ranking and then just cross them off if they choose a team (and not us). I do not think FIRST should change the Alliance Selection procedure. If nothing else, its a suspensful part of the competition.