I believe you completely missed an important part of my comment: "And I think the Dev Team should be spending their time on new projects and older content that didn't suck."
1) Fellowship NPCs did have limited use, and unlike with Evolith Gear, I know many people with level 70 NPCs. It's only logical to update the NPCs in light of the level cap increases.
2) While I think we players first saw Augmented gear in the Evolith system, SE has since clearly demonstrated that the idea behind gear augmentation had a much wider scope than we thought when it first appeared with the Evolith system. Since then, we've seen augmented gear from ANNMs, FoV NM battles, Gold Chests in Abyssea, and the entirety of the Trials of the Magians system - from simpler weapons, to job /emote torques, and all the way to powerful Empyrean +2 Armor and Empyrean Weapons.
3) Abyssea was not the first example of new content in old areas. Until a solution is found, FFXI will be limited by both PS2 storage capabilities as well as the degree to which SE funds the continuing development of its old, legacy MMO. I don't know if SE wants to fund the development costs of new zones for events such as ANNMs, VNMs, Fields of Valor, FoV NM battles, the three Addon-Scenarios-That-Shall-Not-Be-Named (and all the NMs and NPCs associated with said expansion), Abyssea, and so on. There exists extensive stretches of unused space and dozens of largely unused zones in FFXI, and it's prudent to make use of some of that space.
I do think we'll see new zones in the future though. I'm fine though if we don't see pretty, new zones. I'd much rather experience good, fun content in reskinned zones. You know what game has fantastically pretty zones and no good content: FFXIV. And I don't know of anyone who'd call FFXIV a well-designed, fun, successful game. I'm thrilled that FFXI has the opposite problem of FFXIV.
4) "it makes perfect sense to make outdate/older systems better via improvements and refitting 1st in terms of game development vs creating brand new content [sic]." I don't know what to make of this sentence. While tweaking good, existing content is perfectly reasonable, it's an entire different matter to dig up and try to restore content that horribly failed two years ago. That dead horse has been beaten enough, and the good concepts from that system survived anyways. Those concepts evolved into something successful: Trial of the Magians. Never again will we play this game without augmented gear in one form or another.
The Dev Team already evolved the failed Evolith system into something new.