Big brother apps goes against the idea of Freedom, which is strongly associated with skiing for a lot of people.
Pulling people over for skiing too fast is a good idea in theory, but in practice the speed police get over-eager; I got pulled over on an empty run back in the day (about 35 years ago). It was at Jay Peak, I was on a black run making SG turns while "tucking it all the way", and the speed control person was off the run hiding in the trees on skiers right. He jumped out waving and yelling in front of me. I, thinking his radio must have crapped out and that he needed to stay with an injured skier and wanted me to go call for a toboggan, immediately stopped next to him and asked him what was up. Apparently I was skiing out of control. I pointed out that I had no problem stopping right next to him. Well it's hard to tell who's out of control and who isn't. So, not allowed to tuck at Jay Peak (and most anywhere else). Too bad.
The skiers responsibility code says, "Always Ski in control.
You must be able to stop or avoid other people or objects." It does not say "Always ski under 50 mph."
As to blind rollers, what I do (unless I have first tracks and there is no reason to suspect that someone could have access to the area from elsewhere) is turn so that I am skiing 90 degrees to the fall line as I come to the roller and peak over the edge, if there is a gaggle of skiers just over the edge I stop, slow down or turn up hill; if there is nobody there I turn back downhill.
As to less grooming, yes that would stop folks with limited skills from skiing fast, but it won't stop the serious speed freaks, who would have no problem straight lining a mogul run at Mount Tremblant (if you don't believe that, you're not one of them). It would certainly lower the numbers though.
I think the problem is lack of respect for other people. That needs to be taught to children as they are being brought up.