5 teams makes sense to start - the player pool available to the league right now isn't as deep as in the rugby strongholds of the world. If you had 10 team right off the bat, you run the risk of having players on the field that aren't up to the level needed to catch and hold the public's interest. By phasing teams in slowly, you can develop that talent pool gradually - all while minimizing the financial requirements of the league until it can prove the business model works. »
The knock-on was from Parra to the ground. The player who first picked up the ball reacted fast enough and was flat enough that you'd have a hard time calling it deliberately off-side (he probably thought he was behind the ball when it was knocked on). It's marginally offside at best, and not deliberately, and there were no Stade Francais players that could have realistically scored a try immediately, so scrum five to Stade is the sensible call here.
As a referee, I have used a push or tug on the shoulder to de-escalate a situation. I started as an ice hockey referee and linesman, so learned some useful techniques to do it safely (linesmen are expected to break up fights and pull apart combatants). When I started refereeing rugby, I was able to transfer those skills. »