In a previous update, Scouts were buffed with better vision for every Age that you reach. In Imperial, Scouts from Non-Malian Civs have a large sight radius for their Imperial Scouts, but Malian Imperial Elite Warrior Scouts have pretty small sight radius, probably equal to Dark or Fuedal Scout vision.
Is it intentional that Malian Veteran / Elite Warrior Scouts (Castle / Imperial) have relatively low sight radius compared to Scouts from other Civs?