I don't know enough about the incidence of concussions in skating in terms of who gets them most often and how/why. To find good solutions can be found, we have to understand the problem.
How common are concussions in figure skating compared to other sports and compared to other skating injuries?
Find a way to keep track by encouraging skaters/parents to report injuries to their clubs and/or to a central group.
How many are due to falls with direct head impact, and how many are due to whiplash or to spinning forces? (In the latter case, it may not be possible to pinpoint what moves actually caused the concussion, but a good guess is better than no information at all.)
In the former case: What part of the head was impacted?
What was the skater doing when the injury occurred?
Did they fall on a difficult risky move they were first learning, or that they had already mastered but always had the potential to go wrong?
How would solutions differ if, for example, the more numerous or more severe concussions were sustained from falls on high-speed triple axels vs. on triple axels approached too slowly to ensure completion by skaters first learning the jump?
What if the incidence of concussions sustained by skaters learning double axels is far higher than on triple axels even prorated for the total number of skaters working on each?
Or did they fall on a routine move where they just lost concentration for a moment or hit a bad piece of ice?
How fast was the skater moving when the injury occurred?
Were other skaters directly involved in the accident? (Was the skater working on a pair or dance or synchro move at the time? Was there a collision with another unrelated skater on the ice at the same time, or did swerving to avoid another skater result in a fall that might not have occurred without that distraction?)
Was there any impact with the boards? (If this is a common cause of injury in figure skating, then padding might be an appropriate response. Is it also common in hockey, worth adjusting rink design to help both communities? But if mrrice's experience was a fluke, would a solution that reduces time and ice space available for practice on a daily basis the appropriate response?)
Was the skater being directly supervised by a coach at the time, or practicing on their own?
Are concussions more common among already-elite skaters or among serious lower level skaters attempting to reach the elite ranks or among skaters of all skill levels and training intensities?
What is the range of severity in these injuries and what factors are involved in the most severe?
Do skaters tend to return to training too soon after suffering a concussion?
Prioritize addressing the most common causes and those with most severe consequences.
Adopt protective measures that reduce injury occurrence or severity without changing rules or techniques first before reconfiguring the whole sport.
One thing that seems to be increasingly recognized by the medical community is that a second or subsequent concussion often has significantly more severe consequences than a first one. So spread that knowledge to coaches and skaters/parents and make it part of the culture for skaters to seek medical attention after any head impact and not to return to the ice until their doctor tells them it's safe, and to wear head protection and limit the riskiness of moves being practiced when they do first return.
Determine what kind of design would provide protection against the most common figure skating head impacts, and what would interfere least with the execution of figure skating moves and awareness of surrounding skating traffic.
Depending on the kinds of moves involved in the most numerous or most severe injuries, does it make sense to ban or devalue those moves? Maybe ban pair skating entirely?
Any rule changes to that affect elite-level program content would have to be done at an international level.
Should similar measures be taken to address other kinds of head injuries or orthopedic injuries, etc.?
E.g., if stepping on the ice without remembering to remove plastic guards from the blades causes a higher percentage of falls with injury (because the skater goes down very fast and unexpectedly even though they weren't gliding fast a second earlier) than any individual skating moves, should plastic guards be banned?