This is very good level Club cricket.
The players know how they should behave and are held to a standard.
Oh, and it works,,,,,,,,,,
Also, should the player apologise straight after the game a ban, if it is a first offence, is unlikely. I suspect those who did apologise have not reoffended.
If I were a soccer referee I would tell the captains that, should I make a decision they didn't like I would explain it once to them. If they kept moaning they would be in trouble - as would any player who expressed an uninvited opinion.
Basically, that is what happens in rugby union - where even the greatest player refers to the referee as 'sir' btw. For a full contact sport the general discipline is very good.