I've long thought that if Stealth armor was added, it should
NOT BE:
A cloaking device, predator camo, etc.
BE:
Something different than another kind of ECM or stackable ECM.
I think it should prevent you from obtaining a target lock until the target is under 400 meters (not a missile lock, just a target lock), and prevent you from seeing what weight class it is on the radar until within that range. Pilots often kind of rely on finding a target on the radar then locking it to keep track of it, not being able to lock a mech because of another electronics warfare package would give it a huge edge at the "run around the edge sniping in" game.