Non-existent less than a week? Based on what? Your intuition? Anecdotes? That's just a gut feeling, an opinion. Contrary to your point of view, I saw a lot of BLU activity for a month. Yet I wouldn't suggest that BLU was a resounding success, because that's just based on my skewed perspective.
You're trying to have your cake and eat it too. You stated flat-out that BLU "performed badly" and used an unverified census to prop up your dislike of the content. Now you're trying to create deniability by saying you were only "suggesting"? Okay, sure.
I wasn't actually comparing the number of people still doing Savage come 4.5 with BLU. I was comparing the rates of completion for Savage from 4.4 all the way to 4.5 with BLU. That Savage/Ultimate had a small number of people doing it, and even less completing it in the span of months. That's okay though, since it's 'niche'. While side activity like BLU isn't 'niche' and thus has to be <this level of> popular to justify its existence, for some reason? But okay, I'll concede in saying that Savage/Ultimate have a distinct purpose for a subset of the player base. Though I wasn't suggesting that Savage will ever appeal to a majority of players. I don't think any content, besides the MSQ and maybe GS actually reaches a majority of player participation. Because like you said, XIV is a casual, theme park MMO that offers something for everyone. And not everyone will take try out or like every attraction.
Then why not do a more appropriate comparison of content. Let's say...DoL/DoH vs. BLU. It's been two months after ShB's release. What do you think the numbers are for the adoption and completion rate (to lvl 80) of the gatherers? Are these numbers what we can be considered "successful"? And are these numbers comparable to BLU's completion from mid Jan to mid March?
Well obviously, no one but SE knows, but it's an interesting comparison to bring up since these two are/were like you said, "aimed at the general player base" and "new piece of content." Unless of course DoH/DoL are also 'niche', while BLU isn't, again.
And you're Pagos' statement, while you summed it up correctly, it doesn't actually mean what you think it means. The appeal for Pagos isn't the same for Savage/Ultimate. Where Savage appealed to the elites' desire for difficult encounters, Pagos was an appeal to the elites' tolerance and like for grinding; a throwback to old MMO's like XI. I mean, I did Pagos with few issues, completed Hydatos and BA, yet never set foot in Ultimate. I'm not that kind of "elite", I guess.