This thread got me thinking, and I'm a bit eager to try Vrill as cheap protection against K-Turns. Run with some other blockers (Bandit Squadrons?) and make sure that your opponent either K-Turns, and suffers an extra strength attack, or bump and risk losing the ability to focus fire.
I'd just K-turn. One extra dice for one ship for one turn is nowhere near enough to make me even think about putting my whole squadron out of position.
But if it puts you in a bad spot next turn, or Vrill's working alongside Keyan, who can out-K pretty much any ship in the game, I'd be getting a lot of value out Vrill for his points cost.