Mr Scruff wrote:6 again is good in principle but is often exploited.
Example, earlier in the season Saints used to often deliberately hold down on the first tackle for a team bringing the ball out of their 22. Bought Saints time to get their defensive line in order - worth it for the sake of one extra tackle. Not worth it if it a penalty is given instead.
I think this is spot on, as a saints fan I'd have to agree we did and still do it a lot. And I thought they'd brought in a rule change to counter this, like you're suggesting.