The difficulty curve in the game has... problems...

[Packetdancer]

Would I like some improvements? Absolutely. I could not make my debuff button big enough when I was progging P1S. I'm on a friggin 2K monitor and even the largest debuff bar setting is about half the size of what I would like. I had to learn to stare at the spot where I moved it for Fourfold Chains as the cast went off so I would know immediately where to run. It just took a bit more practice.

I swear, no UI change I've made in this game has done more to ease annoyance in savage raiding for me than breaking my buff/debuff bar into Buffs, Debuffs, and Persistent Status. (No mod required for this, just mucking around deep enough in the normal HUD layout tools.) I leave persistent state -- FC buffs, food buffs, etc. -- down at the bottom of the screen, and then stacked buffs and debuffs on top of each other directly above the party list, and made them a bit larger. It was E12S phase 2's Relativity mechanics that drove me to do it, but I've never regretted it since; it's been nice to have this tier as well, both back in P1S and for P4S phase 2 Curtain Call timers.

ANYWAY... I have little use for mods that tell me how to play the game (as it seems you also feel). I have a great deal of hypothetical use for mods that make the UI a little less dumb about things. (Look, I have opinions on UX. They are sometimes very strongly held opinions.)

If I have the boss as a focus target, I don't need to see the first like... 5 buffs/debuffs from everyone, I'd probably like to see just the ones I put there. I likely don't care about how long is left on the SAM's Higanbana if I'm the healer... but I might about my own Dia or Eukrasian Dosis. Yes, you can tell the game to only show the things you applied on the main target, but I actually do want things there, so that -- for instance -- I can see when the NIN has Mugged the target even if I'm not the NIN. Or see which Condensed Libra another BLU has applied if I'm doing BLU duties. Etc.

(While on the subject of the target UI, I would also like a way to highlight which buffs or debuffs are mine on a target while showing the rest. But that's really more a nice-to-have in like alliance raids or something, where you wonder "Is one of those two Higanbana mine? We do have four SAMs in here...")

The party list can get really crowded with buffs/debuffs, especially in some fights. I probably don't care whether the RDM is Verfire Ready, nor do I care if the BLM's got Thundercloud for their next Thunder spell. Conversely, as a healer, I might want to see whether the Regen I put on the tank is still there. Or whether or not everyone in the party actually got that Kerachole or Medica II which I tossed out there. Wouldn't it be nice to have a list of "unless this buff is mine, I don't care whether it's there or not" status effects which just get omitted from the party list, so that the ones you do care about don't potentially get pushed off the side and vanish? I sure think so!

Is it dumb that you can only store five waymark presets for all the instances in the game? It absolutely is, considering the waymark presets are stored client-side rather than on the server! And you can only use a preset in the instance it goes with, so why can't I have several sets? I'd sure like for those five marker presets to be duty-specific, or to be able to swap them in and out! Or something so that, for instance, I can have waymarks for the current raid tier and for all the current extreme trials; I love to help folks in my FC who want to try things for the first time, but it's really annoying if I no longer have marks for, say, Zodiark EX because I didn't have space!

(I'll concede that the waymarks are backed up to the server when you manually archive your settings, so if someone had 11 billion waymarks that could actually be a problem for servers. But if it only backed up your current five while also letting you swap those five in and out for others you had saved locally, even just that would still be a massive improvement.)

I'd really, really love it if I had a "Greed All" or "Pass All" button in loot windows. I'd love it even more if I could tickybox a thing that said "Apply to all loot for this duty." before clicking one of those, so that I could tickybox it at the beginning of Stone Vigil or Dzemael Darkhold and click "Pass All" and then just ignore loot for the rest of that dungeon run. Because the chances I actually want something from Halatali or Haukke Manor when all my jobs are at level 80+ are pretty close to absolute zero, let me tell you!

Etc.

None of those are meaningful changes in terms of actual gameplay mechanics; they're just QoL changes that make existing UX better. (Or at least, give options for behavior I think is better.) I can't speak for anyone else, but that -- UX improvements for QoL -- is honestly all that I'd use mods for, and if there were mods that gave me those specific UX tweaks... then I'd be really dang tempted to look at mods.

So as much as I think the current fuss over UI modifications is kinda overblown, I'm choosing to take SQEX's statement that they're going to look at popular UI modifications and maybe add them to the game as a net positive, because -- as someone who plays on both PC and Playstation 5 -- I would really like it if I could have those sort of improvements natively in the game, and thus available on both platforms (and without having to ponder breaking ToS to get them).