Yes, I know they are a controller, but notwithstanding, they have a frickin' overheal on 'C'; a decay orb on 'q' and a self revive on 'x'. Also, you can smoke after you die, so you can just rush the site without any care.
the overheal combined with the decay seems way more busted actually, you are weakening the enemy while empowering yourself, The only other agent that does this is Kay/O