I have a suspicion clubs don't want to release the tentative schedule because they know players will consider other options once they realize it's not going to work for SC HS players unless there is bunch of changes and more winter play. Too many games in the spring and not enough in the winter. When there are >50% trying to play HS and doing club games on the weekend it's just going to be difficult to keep teams together and kids won't show up for some games &: practicces.
The start is likely too late, only a handful of winter games, the $$ showcase bunched too close together so who really wants to pay and register for something they won't get much out of? Play 10 games but pay for 20 is not going to sit well and some will just bail or won't want to pay full price.
The seniors are normally busy in the later spring with activities also so don't expect much participation from them, maybe some of the younger freshman or middle schoolers wont care but if the SC SW wants to have good participation for the olders the schedule really needs to be changed.