honestly, i'm not surprised about these numbers.
the biggest problem behind that is how SE handles iLvls, stats and character progression itself.
i myself quit when 2.2 released because i felt like a hamster in a treadmill.
there was not enough interesting content that could be done besides coil & CT.
and the same problems will arise in 3.0 > 4.0 again if all they do is keep using old content and simply upgrade on it by adding new ilvls.at some point you will stop doing old content and simply go for the newer content.

i didn't even finish my normal alex 190 equip because
a. i hate the alex raid, it's boring, short and i really could care less for equipment if i won't make use of it.
b. you can get 180 & 200 equip by simply going into dungeons or pvp.

i know ppl hate hearing it, but this is what made FFXIs content last so long.
you didn't have one set of equip that was useful, but rather had hundred sets of equipment that were equally usefull for different situations.and as the game got updated or an exapnsion, they kept on adding new interesting things (this of course applies to everything that has happened before the level cap increase, after that shit has just gone wrong)

the ilvl race is killing the content.if they had various types of content and not just fixed 8-24 man raids, but also content that allows you to pick your own group size or make your own alliance for it, aswell as equipment of the same ilvl but with different stats and most of all with more stats, then i'm sure people would also replay content.
but instead we get alexander and nothing else.what if people don't enjoy the alex dungeon like me? there is no other interesting endgame dungeon to do of equal level, so i'm left with grinding for tomes.

i say, add more content for casual and hardcore players besides 1 raid that gets upgraded every few months, stop changing the ilvls so much but rather stick with equipment that is more than just something you will throw away once the ilvl gets increased again.