Re juniors, I would think priority would be to not have the SACA comp clash with school cricket. So schools on Saturday, SACA and Turf on Sunday. One U15 and U17 team would be fine with fluidity between SACA club and Turf club. Perhaps every player is registered and pays subs to their turf club and the SACA comp is funded so juniors don’t pay two lots of subs.
Re seniors, again, if there is fluidity of player movement between SACA and Turf clubs, less teams would be fine.
I’d have a Premier League of the top 8 clubs playing each other club in all 3 formats plus finals.
Then a District League of the remaining 5 clubs and the 2nds of the Premier League.
Then the 3rds, with an option for those not in Premier League to field two teams if they wish.
The premier of the District League, if not already in a Premier League, would replace wooden spooner of Premier League in promotion/relegation system.
This would improve standard of top level and make current 2nd Grade/District League far more competitive and important.
Where that falls down is any player with serious state aspirations has to move any time the club is relegated. Becomes a revolving Much simpler to get rid of three teams altogether imo. Keep 4 grades with 10 clubs should raise the standard of 4th grade and clean out some of the players who have no prospect of playing higher.
Get rid of 16 whites. Lots of kids in it who are not much good and are only money makers for the clubs. Keep 14 whites but very much bowlers bowl and batter bat. Seeing 14s teams where every bowler gets a bowl regardless of ability is no good imo.