You know how we lost a dungeon per update for more content like Diadem and Palace of the Dead? I wish they'd do that with Savage... It isn't popular content, so work on something different instead...
Now, don't go taking that as me suggesting we should drop "challenging" content entirely, I'm simply saying do something different with those resources... I'd say the biggest issue with Savage is one of accessibility, you need seven other people on the same page as you, and most can't be bothered with that... So scale it back, give us 4-man Savage encounters instead, that would be much more accessible to everyone, and challenging 4-man content has been something requested for a long time now...
Unless the 8-man requirement is somehow core to the raiding experience, I don't see much problem with that... We'd still get similarly challenging pieces of content, but it would be much more accessible, which means more people will attempt it and justifying gated story/etc. becomes much easier...
Alternatively, I'll default to an old suggestion;
Basically flip the current way Normal/Savage work, and implement the Normal mode after the Savage mode has been cleared...
New Alexander gets released, both Normal and Savage difficulty.
The first quest everyone does is for the Savage difficulty, Normal cannot be accessed.
This quest automatically fails the moment one group on your server finishes it.
Upon a group finishing this quest, the Wandering Minstrel now grants access to the Normal mode.
Since one can imagine some servers may never clear Savage, a date would be set upon World First for Normal to be unlocked.
Savage can still be challenged, and the current reward dynamic remains the same.
You can do some interesting things with this... For starters, it has a built in Server First acknowledger... If your group clears Savage for your server, not only can the Wandering Minstrel acknowledge that in the Normal mode quest, but that Savage quest which only one group can clear? You can attached something special to that... Essentially treat the cutting edge raiding community in a similar way to how PvP and Feast are being handled... Got Server First? Here's a piece of vanity armor/mount/minion/furniture/title/etc. that nobody else on your server will ever have... Other than the other seven people you cleared with, that is...
An exclusive reward like that might drum up some initial hype behind Savage, get more people interested in trying it out... I mean... Is there even a reward for even getting World First at this point? I mean yeah, Yoshida might say congratulations on the forums, but who cares? Mounts and Minions, on the other hand, a lot of people care about those... If everyone knew one was locked behind World/Server First... Well, if it doesn't generate interest in it, it will at the very least create some entertaining drama from entitled crybabies - Can't have enough of that these days...
Right now the only reward I see for Savage at all, is an item level boost which is both not required for any other content in the game, and entirely irrelevant in a game that burns through item levels at the rate XIV does... I have no interest in Savage for pretty much that exact reason... I don't care about the rewards at all, those rewards exist to make Savage easier, and I'm not going to follow the cyclical logic of "I raid to get better gear to raid!"... Even the story doesn't strike me as a good reward... I still haven't done T13, know why? Same reason I'm only just getting Kirin, I don't enjoy finding seven other people to jump rope with, meanwhile I have an absolute blast duoing content... That said, I have no problem with them locking such stuff behind Savage, pretty much for that reason... Not a lot of people cleared Coil when it was relevant, so what? A level cap came in and made clearing it trivial... Those resources weren't wasted on a 1% that cleared Coil, those cutscenes are still there and still available for people to go do...