I see that they have already done this with Story Quests, making it so that, if you complete the Hardcore version, the Casual difficulty will also be counted as completed. I'm a completionist type of player, so I usually like to 100% all games that I play. This would make my life so much easier, instead of spending the monotonous 5 extra hours doing the Normal and Hard difficulties over and over for all ARKs, and Expeditions, instead when I can just do the Super Hard difficulty for each one 1 time, and not have to spend the extra hours without getting much from the easier difficulties.
I hope this really does come into the game, since it's already been done with Story Quests (Hardcore+Casual), I see no reason why it can't be done for all other quests on Super Hard.