Could of points I want to address that aren't correct:
Gear does not become farmable in Savage until 2-4 weeks before the next tier comes. Asphodelos Savage unlocked its coffers in patch 6.18, just before 6.2 released.
Asphodelos Savage was added in Patch 6.05 on 4th of January 2022, and Unlock happed in 6.18 on 4th of July 2022. 181 days inbetween ( 6 months )
Ultimate was added 26th of April
6.2 was 23rd of August
This means that i600 was a weekly lockout of 181 days until Ultimate was released (what the gear is used for).
50 days later, 6.2 was released. This is far from half of the duration(1.5months of unlocked gear vs. 6 months of locked in a 7.5 month life span) This pattern exist also for other raid tiers within similarities. The only exception so far was Shadowbringers, with a much longer raid tier due to covid and they unlocked them in an earlier patch.
I agree that there is an argument for "who is it too slow" because ultimately, the savage bis is designed to be used in Ultimate content (and also why some people do not go for BiS after clearing because they have no use for it.)
But it's slow for those who wish to use the sets for Ultimate, locking themselves into specific roles and it assumes a world where you have only one group, one job you play on. It allows for very little flexibility.
Then we have to look at what an RPG is, and who plays it. This actually affects casual players more than raiders, because those who are casual(In this context, I refer to players not doing savage raids.) have it even worse: Tomestones. These take forever to get, 450 per week, and god forbid if the game we played were to have one of its main qualities about playing multiple jobs on one character it would be a huge slog to actually get gear on most jobs in a timely manner. Savage players aren't AS concerned about this because they DO have savage gear (bis isn't 100% necessary for ultimate, it just stacks all cards in your favor so running non-optimal pieces is still valid just not sought after or desired).
Now, one can make the argument:
"But Mia, they casuals don't need that higher item level gear. The content they do doesn't require it!" and while in essence, it would be true, who plays an RPG and wishes to live in a stalemate for for 7 months with gear? RPG's and especially games with items with increasingly higher stats, everyone aims to get stronger and stronger.