Change the requirement that means that taller passengers on flights be given adequate legroom to sit comfortably, not just on long-haul flights.
Why is this important?
Even on a flight of two hours a person can experience large amounts of discomfort not being able to sit the way their body naturally should. This increases chances of DVT and a build-up of lactic acid. Moreover, it is hard to fully accommodate the brace position, if necessary, in such a situation.