Customizable abilities(idea).

[Dirmagnos]

First, there should be section on forum for all ideas, not just for mercs and skins.
Idea is fairly simple, to allow customize merc abilities to a certain degree, with both pros and cons. Like 20% faster medpack regen rate, but medpacks heal 20% slower, or vice versa.
Could be a separate crate for those mods, with random drops. And specialized crate, with random drops, but for selected merc. They also could act as credits sink, since once ability is replaced, its permanent and previous one is discarded(and if player dosnt like it or wannt something else, he has to replace it again).
With possible synergies with certain perks.