Hey,
I never saw anyone play this upgrade and I think it's pretty decent since it can be used on enemy ships. For two points, be able to cancel a hit or a crit, I played Grievious crew and it's really useful even if it triggers only once.
Maybe on Nantex with two slot of this type, it would be still able to have an offenssive upgrade like Ensnare or Predator and then Treacherous to be more resilient.