If these girls are already committed to a Division 1 school then why does it matter if they are on varsity or not? They are already committed as freshmen and you have gotten what you wanted out of your club choice. I would much rather have my daughter on JV playing as a freshmen than riding the bench just to say she is on Varsity. In many of the better lacrosse programs it is rare for freshmen to be pulled up and to get significant playing time because the talent pool is very large. Also being committed does not automatically mean that they are better than girls who aren't committed, just means they jumped at an opportunity.
No HS coach whether they run a club or not would purposely leave a player on JV bc of club allegiance if those girls would help the varsity team. It may seem like that is the case because you're directly affected by it and its an easy scapegoat, but if you think your daughter should be on the varsity team, maybe you should talk to the coach about it before bashing them on these message boards, I'm sure they have a plan in place.