So,i have some guesses from the info SD provided so far.
Case 1: a loadout system similar to merc deck, where u can use different (maybe a limit of 2-5) Secondary loadout cards to Change/Override weapons/augments of ur Primary Loadout Card.
Case 2: Everything from case 1, just u have to craft/open each secondary loadout card slot using Fragment and/or Credit or real cash.
Case 3: You can sacrifice loadout cards or Fragments+Credit or, some new Item (which u can maybe craft/buy) to try to change 1 weapon/augment of your choosing of a particular card, but the resultant will be decided with RNG. [possibility= any weapon/augment that merc has in other loadouts]
What do u guys think? can think of any other possibilities? suggestions?
Would be nice to have some more info in this game changing matter.