Powders and fragments was not a problem, and never was. On average, I get 30 of pure status fragments daily.
Between myself, and my group, we have hoarded thousands of the unknown frags. That's just one group. Now collectively as a server that would introduce X number of powders, and leading us to the same situation with the unknown frags.
While I do recognize that the green frags are losing their usage (people are maxing out and the content is done daily/repeated), perhaps alternatively; green frags to be exchanged to one of the 3 select costumes from betel.
1 > 3 is too high, and if everyone is adamant about the exchange, an appropriate numbers needs to chosen for it be proportionate.
1 full party introduces ~96 (or more from chests) fragments per instances
There are many "worthless" items from instances (ie: Temporal Fragments [25867]: There are literally thousands of these) but why should CT have special attention specifically? CT is already a money printing instances with a daily cd, and alts.