They were perfectly fine when they were initially built and the design aircraft was the DC-3. However, in today's world, this significantly limits the availability of newer aircraft types that can properly serve these airports, particularly post-December 21, 2010, when new performance regulations took effect regarding scheduled services.
Par contre, aujourd'hui, cela limite le nombre d'appareils qui peuvent s'y poser, notamment depuis l'entrée en vigueur, le 21 décembre 2010, des nouvelles règles relatives aux rendements lors des vols réguliers.