There was a point a few years back where about 90% of each highlights reel of a 6 Nations game was made up of those lingering close-ups you seem so fond of. You wonder who reviews the final product and thinks "Yep, this is what the fans want to see."
While I can see where you are coming from, you have to realize that a big factor in such an incident in the past warranting only a talking to from the ref is that the ref and his assistants were often unaware of what started the fight and who had done what. With their eyes on the game, a lot of times they would look round and see a bunch of players pulling guys apart. With no hope of dishing out just punishment, the solution was to just call the captains in and tell them to put a stop to it.