We all know how bad RNG can be on this game so let’s roll something different in the crafting system.
Suppose you got to collect all 9 possible loadouts of Bronze loadout for a particular merc (good luck to that). Wouldn’t it be better if we can “trade up” to the next level rarity (like silver) for our choice of loadout without invoking RNG to roll us a new silver loadout? Note that this does not involve any credits as well, so collecting the RNG drops from equipment cases can be given a bit more value.
If you by RNG or otherwise get to collect a set of 9 (similar skin set, ie: alpenfaj, crown, bamboo) in higher rarity other than bronze, the same trade up mechanic applies.