Hello. I wonder why every (or sorry if I am missing any of them) agent have their reusable (cool down) abilities but brimstone? One of his abilities must be reusable. Such as Molly or smoke

I've been playing around bronze, iron and silver since episode 0(?) and about a year ago I noticed that I would encounter people I'd played with or against before, fairly often (I don't know why, but I remember a lot of usernames). My quest...