One thing I would say is that I've felt a real lack of consistency across the board. I accept that referees, like players, have their own strengths and weaknesses. But having played as high as Capital 1 and as low as 15, I think there could be more consistency, especially where cards are concerned.
I have played in really rough games, with studs up challenges every 50/50 ball and no cards issued. I have played in the most relaxed social game, in Cap 5-6, where a timid sliding tackle was sanctioned with a red. I have seen elbows and punches thrown, with no action taken. And I have seen players sent off for shouting "It was't off-side".
I really don't envy refs, and I admire them for giving up their time (often copping abuse and threats in the process) so that we can play the game. But I think more could be done (by CF? More training? I admit I don't know the process used to coach referees presently) to have more uniform standards of refereeing.
Edit.