As we have more expansions, we have bigger glam loots to collect.
The leveling dungeons are always easy because they always give you a non-duplicated bonus gear of your role when completed, so it is just a matter of patience.
The 8-man raid are a bit more heptic cuz you deal with a free-for-all token-based system. Weekly lock helps deter people from just bidding on everything, but only last until the locks are lifted. After that, it is a battle between needy folk and "well let's collect them all just in case" folk. So it is like half-RNG and half-token-roll when raid lock is no longer there.
The end-expansion dungeon (50, 60,...) and the 24-man raid are the worst offenders. The drop are completely random and you may run for months for a single piece of glam you want cuz RNG tells "Haha, suck to be you". I ran a lv70 dungeon in daily basis to get that healer coat for like a whole month. It is especially disheartening in 24-man cases because of the party composition 1 tank - 2 healers - 5 DPSs. Outside of tanks who will always get their tank gear cuz they are the only tank, healers will have to compete each other, so do DPS of the same role. Even Ninja sometimes cannot escape the fate of seeing one more Ninja in their party. Casting and Aiming have it worst cuz it is so easily to encounter them for each have three jobs. The gear you want to drop is already RNG-based, and now you have go for another RNG-battle against your fellow players. Imagine grinding for a month for a aiming glam on your bard, just to get taken by a random dancer. And tank, despite being the solely Fending glam getter in a 24-man, they still have RNG-drop to deal with. After weekly lock is dropped, it will help speed up the collection, but still do nothing about RNG drop and RNG-roll between players
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So, how all of these things should be fixed? I suggest to change RNG-based to token-based. Efforts should have a clear goal to strive forward, and every effort should be rewards.
I know people will just grind the shortest dungeons to get such tokens, but that only happens if there is only one currency to grind. What if each dungeon drop their own tokens like 24-man raid? They will no longer seek to do the shortest possible dungeons but will do everything relevant instead.
-For end-expansion 4-man dungeons: ? To get your fav glam outside of RNG loot, you need to grind your dungeon of choice + previous end-expansion dungeons to collect their currencies for exchange. Let's say you want to get a Heirloom piece from Matoya dungeon: it will require you grind both Matoya and other previous dungeons (Twinning, Amaurot Gauntlet...). The required number of currencies from each dungeon should be 3 of each for body/leg, 2 for head/hand/feet, and 1 for accessories.
-For 24-man raid: ShB and EW introduce the coin system which are used for gear upgrades. Some people are not interested in upgrade, or already done with upgrading, so they should be able to use these coins for something else, like glam collection. The first raid of the series only require its own coin, obviously. but the second will require two types of currencies, and third require three types. For exchange rate: 3 of each for body/leg, 2 for head/hand/feet. For older raids like Crystal, Void Ark and Ivalice, adding currencies will do.
-For 8-man raid that is no longer under weekly restriction: players to do all raids of a tier to get 4 type of currency where they can exchange to any gear currency they want. For instance, they run Panda 1-4, get four currencies that can be exchanged into a single piece of body glam.
Aside from giving players a sure-fire way to get their glam, I believe this token-based model will also attract players from doing end-expansion raids and dungeons.