What I think will really change the game is a special helmet designed for figure skating. Something that is lightweight, has a strap (so it won't slip off in fast spins or jumps), allows air and doesn't trap sweat, protects the back of the head area that is the most common for head injuries, and looks fashionable.
Trust me, as someone who comes from a country where helmets are compulsory for bike riders -?
There is no such thing as a fashionable or attractive one. No matter how the makers try and spin it. They can be jazzed up and made reasonable, and you can get used to seeing them, but they are what they are, you might as well try and design sexy and appealing kneepads.
If you bring in compulsory helmets (or pretty much any other safety gear), then the music, the programs, the artistry, the dresses and the spectacle may as well be thrown out at the same time, because helmets will simply negate them all. It will simply come down in the future to how people perceive the worth of the music, the programs, the artistry, the dresses and the spectacle. I can't see it being mandatory (certainly not in Russia or Japan, where the sport is biggest) unless you turn it into a completely different creature. A utilitarian one.
But hey, maybe that will be a spinoff new sport...