Overall i believe FFXIV is a good game, but I believe it personally has quite a few flaws and some head-scratching decisions made by the dev team that just don't make any sense to me. I probably can't list everything in this post, but here are some things that come to mind:

Crystalline Conflict (Casual) should be queueable with friends

-Keep rank solo queue if it means that much to the devs to keep the ranked system "integrity". Let the casual mode allow for players to queue in together without having to try to queue at the same time to get a game together.


Relic quests should not be X amount of tome turn-ins most/all the time

-We already have a tome weapon that comes with each savage tier. The relic should not fill a void that is already filled with tomes that are already used in plenty of other avenues


Savage BiS gearing needs a serious rework

-BiS gearing in Savage is the only system in the game (that i know of) that is built with 1 job per character in mind instead of all jobs per character (which FFXIV is advertised as the latter)
-Ultimates are the only true need for BiS currently, and we don't get an ultimate after each savage. There needs to be more content that needs this BiS (Savage and Criterion don't need the gear. It is just beneficial).
-Previous BiS savage gear being completely outclassed by the new crafted is bad game design. They won't change it because it would tank the crafting market, but using this tier as an example, previous savage should've been 640/645 and new crafted should've been 630 (new crafted gets you into min ilvl for p9s)


Boss design needs to be reworked

-Bosses shouldn't all be bigger hitboxes, wall bosses, or swivel bosses. Bosses shouldn't always teleport to the center. Boss positioning doesn't matter in normal content, and those responsibilities should be kept in hardcore content. Basically we need better role responsibility in fights again


2 minute meta needs to be reworked

-They've over-hemogonized the jobs and they still can't balance them properly. We are literally getting the worst of both worlds in terms of job design right now, so they've opted to decrease the dps checks considerably as a "temp fix" lol. Dawntrail needs a serious revamp


That is all i have from the top of my mind right now, but i'm sure there are other things .