If you've got a scrum that can win penalties and that is a tactic you employ, you'll probably keep doing it regardless of whether you can kick at goal.
Maybe at halfway, but you're hardly going to do that when you've got a scrum in centre field on the 22. Watching a dominant scrum is great, and there should be reward for dominance. But the reward shouldn't be an automatic 3 points every time there's a scrum in the opposition half.
But I'm not really talking about a dominant scrum hammering another scrum and forcing a penalty. Most of the time scrums are reasonably even but you still get all the mucking around. Teams know if the scrum collapses a few times there'll often be a penalty and it's often a lottery as to who gets it. And if you're in kicking range, and they're not, it can be worth the risk.
Getting rid of penalty goals wouldn't make scrum collapses extinct. But it would have some impact. The greater impact would be in how teams go about trying to win.
Providing you punish cynical play and have the breakdown laws adjudicated in a way that allows the attacking team to play rugby, I don't really see what else you can do.
You can only lead a horse to water.
But the current laws don't lead all the horses to water. The Brumbies and Sharks game wouldn't happen in a rugby without penalty goals. The reason the game was played like that was because neither team were willing to run the ball in their own half. That's due to the threat of conceding penalty goals or making a mistake and conceding possession - giving the other team a chance to force penalties and points at the scrum etc.
The weather wasn't even that bad. Teams shouldn't be afraid to play with a little bit of rain about.
People seem to ignore the fact that 6 other games were played and some of them were very entertaining. It's not the laws that determine whether teams play entertaining rugby or not.
And none of them were top of the table clashes. 11k and 60k viewers for a top of the table clash is a pretty big indictment.