Vlandys says he will back them to do that regardless of media furore that will erupt if we see 30plus penalties a game (Thinking about it the dumb six again rule change is going to reduce penalties for ruck infringements for this reason)
Sharks coach said in something a few days ago that something like 56% of penalties were ruck infringements so it absolutely will reduce the penalty count, significantly. But changing the name and way its dished out doesn't mean its no longer a "penalty" play just resumes quicker.
I'd wager offside penalties jump to make up the difference in penalties blown unless discipline in the ruck improves a lot.
If no one is onside and its a 6 again called they're gonna be copping the offside penalty over a line break and probably try. If its tackle 14 they'll do it for the breather - has anyone spared a thought for the merkin who changes the tackle count graphic?.
Professional foul call will be a risk but we're not gonna replace ruck penalties with sin bins so unless you're a certain few players you'll be right. If everyone is offside and 2-3 guys make a tackle they're not all getting binned.
Laying all over a tackle will still result in more time for the line to set in defence and 6 more tackles just without a possible touch finder or penalty goal.
tl;dr: Wanna break in play? Be offside, preferably in company. Slowing down the tackle is still slowing it down, the defence still gets that time to set.