Unless SE plans to massively restructure how the game works, I imagine the only things that won't be gated by the MSQ are new jobs, area access, and maybe leveling dungeons.
V'aleera's Wiki - https://wiki.ffxiv-roleplayers.com/pages...eera_Lhuil
V'aleera's Tumblr - valeeralhuil.tumblr.com
V'aleera's Tumblr - valeeralhuil.tumblr.com