Based upon your description, it sounds like the soft yellow/blue card isn't working as an effective deterrent. To me it sounds like its just punishment, that does nothing to improve the game. In fact, it sounds like the opposite with short-handed teams having to pack-it in for periods at a time, which certainly takes away from the "beauty" of the game.
I understand people's concern for "cynical" fouls, less understanding for "tactical" fouls (neither of which I believe are defined in the LOTG), but it seems that under the current laws these types of "intentional" fouls are already covered, particularly for DOGSO. What tools do referees not already have, including direct communication (for example, verbal reprimand or warning), to combat these fouls?
IMHO opinion, the solution to dissent is easy. Only the Captain is allowed to speak directly with the ref when discussing a call, all other players need to maintain a certain distance if a call is in question (not a distance that needs to be strictly enforced, but its obvious when a player has encroached on a ref's personal space).
Having said all of this, I do like the HS rule for coming off the field on a yellow, but teenage boys are a whole other beast (although some beer league adults, sometime aren't any better as they attempt to relive prior "glory').