Not only are red cards rare,in most cases,the majority of spectators agree that the red card was warranted.Red cards are a rarity. There's been what, about half a dozen this season out of 100 odd games so far? I'd guess this is also more than there usually are in a season.
Maybe the underlying intention is that teams should generally lose the game if they have a player red carded?
I would be deeply concerned if that was the underlying intent. Take Sam Warburton in the RWC v France. In terms of test cases, it is obviously at one end of the spectrum but if anyone thinks that losing a RWC semi is justified because your captain got a little over enthusiastic at the start of the biggest match of his career then I would be shocked.
Much lower level but similar to the Warburton example, Jordon Jackson-Hope was red carded in the first 10 minutes of the Schoolboy International between Aust Schoolboys and NZ Barbarians last year for an absolute dumbarse dangerous tackle. The Australian Schoolboy team really had little chance for victory after that.
Mind you had he not made the dangerous tackle and stayed on, the same player could have knocked the ball on with the tryline open, or he may have missed 4 simple penalty kicks for goal, causing his team to lose the match.
It was clearly a red card offence. I don't really see the way to improve that situation as being to reduce the severity of a red card. The way to improve it is for the player not to commit the red card offence.
As was Warburton's.
Consistency may be the key. Some Citing Commissioners seem to be a lot more vigilant than others.
As the impact of the punishment varies depending on at what point in the game the card is issued, it's hard to have a debate on this.