Infiltrators work fine the way they are right now. They do not need to be nerfed or buffed.
It's just a class with a murderous learning curve. (Pun intended.) You'll have a few executed or deported characters on your hands before you figure out how the class should be played.
The players who know what they are doing can inflict a lot of damage with infiltrator characters. Coordinating with a bunch of other infiltrators in your realm helps as well. I've seen entire realms crippled because almost all of their senior leadership have knives in their backs.
