Just theoretically speaking, without considering costs, why is the idea of motion sensor technology crazy? These skaters' jumps and scores and thus whole competition rankings are dependent on fully rotated (or within a quarter as long as it doesn't hit the 1/4 angle) jumps. If there could be a fairer system designed that isn't prone to human judgment and error, why not develop it? These are real people whose results hang in the balance.
Speaking for myself:
I'm all in favor of people who have both the skating knowledge and the technological knowledge investigating what can be done with technology to obtain objective data about the skating.
However, I don't think it's just a matter of saying "Wouldn't it be great to devise a machine that can do X?", tinker in the lab for a few months, and then come out with a usable product ready to replace the human eye assisted by video. I think it's going to take a lot of trial and error and test events with prototypes and beta versions on a variety of real skaters skating individual elements and then whole programs in a variety of different kinds of rinks/arenas, and going back to the drawing board several times, to come up with something better. And that process is going to take money.
And then when someone does invent a system that does everything we want (measuring jump rotation, and/or measuring speed and acceleration and edge depth and ice coverage, maybe identifying turns and correct edges) better than the human eye -- then there needs to be a way to manufacture as many of these machines as needed for all competitions where they would be used. If it's something that goes in or on the boots or the blades, then does it get attached at the competition in a way that doesn't interfere with the skater's usual way of skating? Or is it something built into all boots used by competitive skaters? If it's something that's part of the venue, does it need to be built into the rink or does it get set up and taken down the week of the competition?
Probably the logistics of manufacturing and setting up and how much cost they will add to the equipment for skaters or competition organizers can't be determined until after someone actually invents a machine that works well enough to adopt. Once we know what kind of machine we're talking about, then the logistical and financial questions might have easy good answers. Or maybe not.
But the research and development process has to come first. And that process itself will be costly and will take time.
So by all means, if someone has the interest and the knowledge and the funding, go for it!
If you have the knowledge but not the funding, or lots of cash but not the knowledge, and you want to see it happen, go hook up with someone else who has the pieces you're lacking.
But if all you have is a belief that it should be possible in theory, but no necessary tech knowledge or money to back up that belief, then realize that the reasons it hasn't happened already are not because no one else wants it as much as you do. Dreams don't become reality just by dreaming.