I think getting a combined six week ban is a bit rough for that. What's done is done though, and I can't see them getting a reduction on appeal.
I do think however, that players need to be treated more harshly on the field, and the off field punishments should be reduced. I disagree with the "but the games will be ruined" line, as I think it's fair to say that this game has been ruined by Scotland losing two starters. Potentially missing a game or two in the judiciary lottery might make attempting these tackles worth it, but an on field yellow or red will really make players think twice.
PS, obviously this shouldn't be started right now, but I would like to see harsher on field penalties in the long run.