At this point I think the best way to rework Trials would just be to have pigments drop with every trials completion or Bahamut Chest, and then your scales count for upgrading the pigments.
Healing pigments are still crap and 7 months into the year we've gotten a whole 1 ASSUMING you could make it to 1,600+ with only good aligned champions and maybe some Dungeon Master rerolling.
Tanking pigments? I think we got 1. DPS pigements? 1 or 2 assuming you could do DURGE with only DPS to 1600 (I couldn't but I can get about 90% of the Tier 4s completed after that event I was just a wee bit not there at that point since I haven't played for a year yet even now)
At the rate things are going if they don't do something those pigments are basically useless. I mean god forbid you want DPS pigments on DURGE for highly restrictive variants, and DPS on someone else. It'll never matter cause you'll never get 6 stacks and going from 1e550-5e550 doesn't do anything. I have SOME at least because I bought the season pass...
But DPS Support would become more valuable beacuse you'd have 2 stacking DPS pigments. I plan to put all my healing pigments on Omin cause he's pretty much the only unit I have that legitimately heals about the whole formation reasonably since I don't use Orkira to try and trigger BUDS Buggy.
The DPS pigment would be a huge boost, It's a 1e4 boost for having 6 DPS pigments. about an e6 boost to have a DPS pigment to level 20. e40 boost for having 6 at level 20 if my calculator is working. This only applies to the formation.
Might need some base potency nerfs or caps to max level or something, but if you want people to be able to boost their power, and have the roles matter more, and hell if you guys were ok with stepping away from the canonical 4 pigments and create gold find, debuff, etc...
This would be the most effective way in my opinion to go about it instead of dumping everything into 10 champs then doing a dismantle to put on next 10 champs.