They have no shields, carry only 2 kinetic weapons and have poor maneuverability. Their external weapons can be disabled.
They are fairly fast, but far from the fastest fighters. Their armour (175) and hull (1750) ratings are relatively high, but certainly not the highest. Plus they have no shields.
All they have going for them is that they are fairly durable and fairly fast.
If they do prove too much, I can always raise the hangar cost. Maybe increase their cost and reduce their armour rating. Thanks for the feedback.