I think that something needs to done about a) the amount of times at penalties/conversions and b) reset scrums
For a) I would just like the rules to apply. You have one minute from the time of the whistle to the time that it must be taken. If the clock is stopped (injury, TMO review) then the whole set up should be done while time has stopped and you have 10 seconds to take it after time has restarted.
For b) apply the rules. Scrums should not push until the ball has gone in and binding must not be on the arm. These are the rules, just apply them. Any prop boring in should get a yellow card. Problem will stop overnight.
And for any player appealing for a penalty. Give one – against them for referee abuse! It would stop immediately.
Watson should have had a longer ban – once you have a card (rightly or wrongly) just leave the pitch. The ref is right – you may or may not agree with the decision but for this match they are never wrong.