Agree that Dickson reffing quins is odd, but all that Heenan has done there is justify himself starting a scrap really.
"He looked at me" isn't really justification for all the abuse Dickson has got over the past few days honestly.
Reading the full docu, it is especially interesting that Marler basically confirms that he says what he said quite a lot as an easy trigger, and that the panel essentially accepts that as not really serious abuse, thus avoiding the need to sanction any future "sledging" of the same note.
Really, if Heenan's mum isn't unwell, nobody cares and it's just mind games. I've heard a hell of a lot worse on the pitch, and whilst it's not nice to be picked up on the mic, I'm not sure many who have played at any level could really say they've not seen / heard anything similar go unpunished.
As a sport, rugby is so so marginal, and if you start banning people for all of it, I'm not sure what you're left with. When you have 8 6ft+ 120kg giants fronting up, a huge part of deciding victory is going to be in the grey of the laws - Id rather that be words than gouging, stamping etc.
Marler is 100% not in the right here, but neither is the rampant abuse of Karl. I've reffed a fair few games and I don't think I've really ever listened to the **** that players come out with at scrums tbh so I'm inclined to believe he just wasn't zoned in to listening what he was saying.
Honestly, the precedent it sets here is - don't chat **** in distance of a mic - rather than anything else tbh.