Well, heck, I think their special mission rule is great. The real problem is their cost. They pay way too much for that AP 3. I would just drop that, replace it with a less overpriced shooting ability (maybe assault 2 18" lasguns?), and then drop their points to an appropriate cost. That way you would have a squad that still has decent shooting, can be very flexible in their deployment, and still act as an effective and cheap means of delivering special weapons.