Their stickies can't one shot, even with over 1.5 million damage.
Their Cluster Seekers and Airbursts will apply the brunt of their damage via status effect, which can be negated by Medkit use or close to full immunity to an element.
Active Sensor turrets deal extremely low damage...

The only remaining options are Flame Turrets, as every other Tech skill is nonlethal. Shock turrets work if you're in a group, but the status effects don't apply indefinitely, and they don't last long enough to net a kill if you're running low Firearms.

I strongly advise that this nerf to Airbursts doesn't happen, and that Cluster get their damage back but not their stagger. Stickies need to only have a .6 or so second delay, so that they're the same timing as the Shortbows. Otherwise, they're completely pointless in PvP and pretty bad in PvE against tougher enemies. If they needed to be nerfed, a better change would've been to slow down their rolling speed.