I will admit. As the MSQ treats the storyline as its just you. I would not be opposed to the MSQ being a Solo experience. Therefore having a Solo mode of all Trials & Dungeons, perhaps for a small reward of Gil, Seals, and 1 piece of gear.
Completion unlocks the group version which grants you access to significantly more gear, mechanically challenging encounters, & etc.

The solo version could per-say be a training mode. Maybe it'd help more people learn mechanics and cool off the tempers over bad players.
Folks who only want story would thus only get their story and not be forced into content they dislike.