Hello - Let me preface this by saying that although I have obsessively bought WAY too many ships, I only get to play here and there with my friends, so I don't really have any tournament experience. Additionally, I am trying to justify NOT "needing" to buy 6 or more Headhunters.
However...
After seeing the stats for the Headhunter the obvious new strategy seems to be a swarm. The Headhunter is a very cheap missile platform. At 12 pts plus the new 3 pt Ion Pulse Missile that's 15 pts a ship, for a total of 6 ships in a 100 pt game (with pts left over for modifications and such). But with its low agility and relatively low hull+shields (compared to other rebel ships) I think 8 TIE's would would thoroughly beat this build.
We don't know the manuevers yet for the Z-95 but I have to assume TIE's will be more agile and manueverable. Even if you get off all 6 missiles (which can be hard to do with the TIE's tricky flying) AND they all hit (which is VERY unlikely since it's only 3 attack dice to 3 agility dice every time - at least for Ion Pulse Missiles) 2 TIE's still survive, and you are now slow, weak, and without missiles. Even if you upgrade to missiles with more attack dice (which you would have pts left to do) you cannot kill all the TIE's with missiles alone. Because of this I just don't see a Rebel swarm as a feasible alternative. Remember, the Headhunter was the X-Wing's predecessor. After the X-Wing became popular the Headhunter was relegated to support duties.
And support duty is exactly what role I think the Headhunter will actually take. Consider this: often I have games where that extra torpedoe or missile I stuck onto an X-Wing or A-Wing never gets fired because the swarm has overwhelmed me, or that ship just died because of a bad roll. That lost missile hurts a lot more when the ship costs 20+ pts. But with the Headhunter I see new opportunities. I prefer to play with high skill rebel pilots, but of course this is expensive. However if I was able to downgrade skill only slightly and make room for a Headhunter with a missile, I think it would definitely be worth it. I can get off its missile early, and at such a low cost I don't mind as much when it inevitably bites the dust.
Even 2 Headhunters with missiles might be better than Luke and a droid. These are the sort of opportunities I see with the Z-95 - not all-out swarms, but a better way to field more ships and counter the Empire's advantage of usually having numbers.
(I realize a swarm of 6 Headhunters might be better against non-swarm Imperial builds, but why bother when 8 TIE's is better?)
Thoughts?