If the LS first turn involves a twilek loyalist I'm pretty sure it's not the greatest of openers. I would be more worried about a 1st turn Obi-Wan with trust your feelings, at that point my board is locked down unless I draw a Tie Attack Squadron with a Fate card.
Thats funny. I'd consider a Turn 1 Twi'lek/Han Solo to be much worse. It wont keep you from attacking next turn, but will quickly dispatch the Devastator and set up a "Timewalk" situation. where the LS is a turn ahead, both because he killed it and a good deal of your resources will be on lock down because of paying for it. Luke would also be problematic, given he could defend and at least prevent the unopposed damage (if not the edge-enabled too) since the Devastator can't kill him in one strike, paricularly if there was a blaster deflect in there.
The thing is, you can easily deploy 2 such big units as a Navy Player now. With one of them having shielding, you can protect your Devastator if you go the defense and stabilize route. Sure, you may have discarded your whole hand to do it, but then again, 3+1 (Death Squadron) and 4+1 (Devastator) bombs are nothing to sneeze at when on the receiving end.
Even in a likely scenario pitting Luke against the Death Squadron, you still get through at least once, if not twice.
Of course, as we all know, such big units are very susceptible to focus icons (hence the shields). Still, I am kind of baffled why isn't the Death Squadron protected from card effects but only from events. If I am not mistaken, given the current card pool, there are only two cards that can target it: Deflection and Rebel Assault. Heat of Battle can still target it. Why such nimble difference? My guess is they probably did that because of knowledge of what is to come, but still… not really convincing ability as of right now.