Sometimes, you have to give the other team some credit. Michigan has two (if I recall correctly) guys that are exceptional at FOs. It isn't necessarily a major weakness of a team if another team dominates FOs. It could be a major weakness of one team, or it could simply be that it's an a major strength of the other team..
PSU lost in the NCAA semis a few years ago to Yale, in part because Yale had a ridiculously good guy on FOs. But PSU beat Yale a year later (I think that's the interval) when Yale still had the same guy handling FOs.
Or look at the recent B1G tourney semi between PSU and Michigan. Michigan dominated FOs in the 1st half, but PSU lead at the half, 10-8. Michigan changed GKs for the 2nd half, and PSU had several offensive plays where they had excellent shots on goal, but were stopped by the "new" Michigan GK.
It's easy to point to Michigan dominating the FOs in their semifinal matchup, and that did contribute to PSU losing the match. While FOs have a big impact in LAX (as you can't score if you don't have the ball), how a team executes their offense, how a team executes their defense, the goaltending they get, how many turnovers they commit, how many penalties a team is assessed, etc. all have an impact on the outcome of the match.
PSU will likely be challenged against teams that have elite FO guys. But PSU has excellent attackers, an excellent GK, and a D that generally causes problems for opposing teams and also limits the attempts by the other team's O. That's enough strengths to win most matches. Only time will tell if it's enough to win all their matches in NCAAs.
If
@ColinPSU is around, he's far more knowledgable about MLAX, so I'd be curious to hear his response to your question, and his take on PSU's team.