Maybe the opposite. When your invader gets his first kill, he gets a marker on your radar, second he gets marked like foetracer. Third he's visible through walls like way of the wraith. Forces your invader to act swiftly on their attack. They still get the suprise attack, but makes a sleeper rampage more difficult to pull off once they're marked. I just worry that if sleeper drops from the meta, it'll just be stacked teams of gunslingers