A design philosophy flaw. Misunderstanding what is fun and reward structure.

[NekoNova]

TLDR: There is no TLDR. This is a well thought out, passionate post. Take 10 minutes out of your day and give it a read.

Final Fantasy XIV is currently, i think, to most players, going through a clear stale period in its development, those of us playing since ARR launch have actually seen very little to no improvement on content areas or significant changes, ilustrated on how basically dungeon and raid design has stayed the same through more than 4 years now.

Sorry, but I cannot really agree to this statement.
It's a way too general sweeping statement that doesn't do the game justice at all.
Granted, there are definitely issues that have been dragged along since before ARR even, but to claim the entire game is stale without improvement?

Heavensward introduced new mechanics in dungeons with stacking and spreading.
Diadem was an attempt at different content, sadly not the content that was wanted or appreciated by most people.
Many of the raids and primal mods had unique mechanics that had to be completed
The WT was a nice attempt at getting people to run content that was no longer relevant

I understand that people dislike the repetition and grinds.
There's moments where I question what's the point of spending months again to collect this one item.
But on the other side, content can only be delivered at a rate that the developers can handle.
And yes, for some people that's probably too slow, whereas for others it's still way too fast.
It's impossible to please everyone with this, and in my personal opinion the delivery cycles are fine. I have enough to do between patches, and can't get everything done either.

[Deceptus]

Diadem was an attempt at different content, sadly not the content that was wanted or appreciated by most people..

It was not appreciated by most the first time it was introduced, or the second time, and now the third time as well.

Why they insist on this type of content is beyond me.

They've had 17 months to get this right. We've lost other content opportunities because they were working on this. And this is the result we get.