Teenah
Would not like to make possible the upgrade of looted/digged mats as well.
No.
Choice+ loot mats and Exe/Sup dug mats are scarce for very valid reasons. They should remain hard to get. As for upgrading the Q of dug mats, I feel it better to just spend the time/effort to master a dig or five and get your q250 mats that way.
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Do not assume that you speak for all just because you are the loudest voice; there are many who disagree that simply have no desire to waste words on you.