Rudder limit based on airspeed
Notwithstanding the AF incident, can I ask the more general question:
Why limit rudder deflection based on airspeed?
If the issue is one of potential damaging loading on the rudder and fin, then surely the load can be measured more directly at the load bearing structures as the pilot input is being applied. The pedal deflection thus becomes a proportion of the total load the rudder can stand under the prevailing conditions.
Creating a dependency on an airspeed that may be incorrect seems to asking for problems.