Duty Support are there for the people who legitimately need them. Having seen some of the threads here and elsewhere from players who immensely struggle with current difficulty (which itself surprises me tbh) removing Duty Support will introduce an entire host of game design problems that will upset a portion of the playerbase. More than likely, uprooting Duty Support will go hand and hand with having MSQ difficulty nerfed back down, trials included.

At most, Duty Support should include random adventurer NPCs like the reworked singleplayer versions of certain ARR dungeons. That way the writers aren't forcing as many Scions into the story. The added writing flexibility should improve the flow of storytelling.