Actually i disagree with this suggestion especially from this sentence
"While this mechanism may seem logical on kRO, where players have been farming COGH and OGH N/H for years, it appears incongruous on our server. Here, farming Temporal Crystals is neither profitable nor efficient, resulting in a scarcity of this resource on the market."
if kRO player read your suggestion they would say "you guys able to spam instance easily, because leveling in your server really fast" and if you think this is not profitable you can always buy it from market and help the economy growth.
you said this "essentially obsolete for us", meanwhile Old Glast Heim could be an alternative to farm because the instance relatively easy and not much gear needed.
But if you still think farming OGH obsolete for the community, maybe better just ask them to delete OGH and other obsolete instance from warper because those are too old content and no one use the item from there anymore.
they were kind enough to change from 15 temporal crystals to 5 temporal crystals to exchange into 1 Abyss Magic Rune.