Motivated by the new refresh legs I unlocked Unity Concord too, and I think I can share your sentiment. In particular the sentence I quoted sums up a lot the real core issue of this system.
Accolades should have been condensated into the same currency, adding yet another one just makes things unnecessarily convoluted.
You start feeling the limits of the max 15 RoEs being active, and the chat becomes a huge, insane, annoying spam fest whenever you have RoEs active and are killing mobs.
The NM system is really nice. Despite me hating the incursion drop system, it kinda works good.
I like the fact you can get NQ gear at decent rates, then "mats" which are used to make the +1 and to craft the SU1 gear.
Gives value and motivation to keep doing those NMs and makes you feel less bad even when you don't get what you want and only get mats.
The Accolades cost to pop NMs is an interesting gating system to slow you down a bit.
The chat system is a mess, the division in multiple unities is quite frankly without purpose and all in all it seems like a system that doesn't work, will never work, and yet we'll have to live with it for a long time, dragging it like a remnant of something that doesn't work.
This enforces my idea that this all started with their attempt to create a server-wide chat channel, after encountering server-stress issues they decided to split it into multiple ones, and THEN they thought "Hey, why don't we justify it with unities, each representing a different cool Vana'diel character?!". I think this is how things started.
But seriously, it makes no sense.
A small fix that I hope they will deploy in the future is making so the best rank for Unity gear activates as long as your unity is within the first 3 spots, instead of the first. This alone might make things a bit better.
As for you Malithar, why don't you change your unity? I'm not provoking you, just wondering if you have reasons to stay where you are or if yours is just a way to "protest" against something you judge unfair and broken.