If you're trying to build a list around a 2 point upgrade card, then you deserve to fail.
Lone Wolf, autothrusters, and R3-A2 say hi.
Cloak's failure possibility is going to keep it from being used at anything more than casual play, because adding more randomness to your list is not something you are going to do at competitive levels.
Now on a certain level that's fine. But would it be better if it was 3 points and had no chance mechanic? Certainly.
This expansion might be the one that I'm most looking forward to in Wave 8, because seemingly everything in it is fresh and interesting.