If the MPSC policy is to not coach from the sidelines during the game, we've not seen it enforced. Not sure when the BFA tryouts are, but MPSC is Mon-Wed of this week for my son's age group. It's always interesting to see who shows up at tryouts - with surprises each year. Regarding the BFA/MPSC issue, for our family it's a personal choice for coaching, overall development, team chemistry and competitiveness, playing time, fun, and practice/game travel logistics. As such, MPSC continues to be a good choice for us.
Good luck to the BFA and MPSC teams today. We'll be rooting for our Lowcountry friends (with more rooting for the MPSC team of course!)