"Pumping out content"?
Do go on.
I think I know what you mean, I just have a difficult time considering re-skinned dungeons as "New content" when despite being enjoyable the first run through on "New car smell" alone, once you get down to the bare bones, aside from Satasha and I think Lighthouse, every dungeon is the same formula. Trash > boss > Trash > boss > Trash > Final Boss. Now, Raids suffer a lot of the same issue being mostly "Walk down a hall and then fight a boss". But thats not to say Alexander wasn't fun, actually, I enjoyed doing it a lot, but I won't enjoy it the 30th time, or the 50th time, because the novelty will wear off... and I know why, nothing changes, its the same thing every time, and its the same formula we've been dealing with since 2.0. They've taken no risks and its all very cut and dry.
Then I have to think, why didn't I get bored of doing the same content 100 times in XI? Answer is I did, I got bored doing Dynamis because it was static, nothing changed, Sea kind of sucked cause it was too dang annoying to move around in.. I got bored of a lot of content in XI after the 80th time, but there were still several parts I did enjoy and didn't get bored of... I think about Nyzul and Salvage and they were just hectic enough that I didn't get bored of them doing it the 20th or 30th time... I think about actually fighting the NMs you had to farm pops for in Sky/Sea/etc and those were exciting every time because a lot of the time there was the real possibility of being rekt. Nyzul being the one I didn't mind doing over and over because it was "randomized" so each run was a bit different... plus NMs had a chance to spawn on each floor, including some bad a** HNMs on the higher floors.. It had built in "Don't get stale" Mechanics. Even Salvage had multiple paths for different armors...
Then I think of Dungeons in XIV, where it could figuratively be defined as an "On-Rails Shooter". You have no control over where to go or what path to take, its just a straight line and you better like it. It never changes. Same mobs, same everything, beginning to end the first time and the 50th time. I think SE does a good job with each Dungeon, I'll say that, but I don't think they consider the long term. Running any of these dungeons once is an awesome experience, its fun and new the first time and its cool to look at the new bosses and just admire the scenery. Then you realize you'll be doing that same dungeon 80 times to farm "Tokens" for your armor, on every job.
I should say FFXIV doesn't have "Bad" content, its all well and fun the first time or two and its very exciting to beat a real challenge (I cheered when I won T9), but once you realize its all you'll be doing for the next few months when its completely replaced, its not as fun the 5th or 10th, or 40th time you have to do it. So its good content for one-offs, but its bad for long-term because theres only so many times I can giggle at lifting up a totem I can only imagine weighs as much as a thousand suns.
So its not about XIV being bad, its about the fact none of the content seems to have in mind "But how fun will it be on the 20th run?" or "How can we keep this fresh since people will be spamming it as the only means of endgame content?"