I can see the argument for Billy's punishment and there is some consistency: First red and he hasn't done the tackle course.
But it does make me wonder what goes on at club training when when I see that and read something like this on the Beeb:
Scrum-half Danny Care says England have been working on their tackle technique every day as they look to improve their discipline for the upcoming World Cup.
I know for a lot of the older players they are having to change years, decades, of habit but the tackle laws got changed a at least a year ago and they should have had the habits changed by now. Its not like they're amateurs training once or maybe twice a week, its their full time job.