Sorry, I extracted the free action Barrel Roll within Expert Handling as the Action taken by using EH.  It boils down to the same thing; no Barrel Rolling twice.

Back to the question with this.  I don't think Vader gets a new lease.  

Any ship with the upgrade ability can take Push the Limit.  They now have Vader's ability for 3 points.  

Giving Vader PTL is redundent not to mention he has a hard time getting rid of stress.  A squint or an A-wing do it easy.

A Saber Squad Squint packs more fire power for less points and again you can give it PTL and put it on par with Vader.  It also comes with Boost.

A YT-100 will almost always have Vader in it's sights no matter where he moves.  If the pilot of the YT-100 is Han, He is shooting in the same phase and rerolling against you no matter what.  Also if there is a gunner or Marksmanship he is eating through your focus and evade token.

I'm not saying Vader is a wasted pilot.  I'm saying that I don't think the boost or PTL or Dare devil combo on him is a big improvment.  I think the assault missile on him or a homing missle.  Maybe Expose.  OH I LIKE THAT!  Vader is good at shooting do what you can to get him more attake dice, now that is interesting.

I'm not sure about Expose on Vader, either. He doesn't suffer as badly as other pilots do because he can still take another action--but I wouldn't pay 33 points for a Rookie Pilot, which is essentially what he becomes. 

I think he's mostly what he was in Wave 1: a flexible presence even without upgrades, and one of the most effective alpha strikers in the game. 

I'd like to play it a few times.  It sounds exciting.  I think stealth device makes him a real pain.