are...What I'm really trying to underscore, though, isn't that it certainly will be good but merely that it's plausible that it might be good. Or, to turn that argument around: I don't see any reasonable argument, before we even see its dial let alone get it on the table, that it can't ever be effective.
Basically, "because it's expensive" isn't actually an argument...
But cost is in fact a reason that a ship might not be viable. Look at the TIE Advanced.
It's easy to see that cost alone is never the reason pilots are played or not played. Whether or not a ship is cost-effective is important, but that's not the same thing.
The reason Wedge is played despite his high cost is because people usually use Biggs and perhaps Luke to soak enemy fire and keep him alive. And he's only 2 points more than the cheapest E-Wing. The most expensive E-Wing could be 35 points before upgrades! A squad that runs an E-Wing with upgrades might only be able to fit two more ships, and that's probably not enough firepower and hit points to beat many other competitive squads with much consistency.
That's gives you a high-PS ship with what's shaping up to be a pretty cool ability, and it's fairly survivable with barrel roll, evade, and Artoo to help recover some hit points--it's not Chewie in the Falcon, but (assuming there's a decent amount of green on the E-wing's dial) it will likely be much more durable than a typical X-wing. And you still have 55 points left over, which is enough to run up to 4 more ships in the Wave 4 metagame. In fact, you could still run a second E-wing with two Bandit Squadron Pilots and still have enough left over for some upgrades on the E-wing (R2-A3 and a Fire Control System?) Or you could spread those points out a little bit and run a pair of Rookies with a Bandit.
That squad overall would be a little light on hit points but heavy on Agility, with decent attack. You probably don't want to keep Corran front-and-center, but he'll be an effective flanker--or you can keep him 1-2 range bands back for the first engagement round and then run him in to clean something up early in Round 2.
Again--I don't know that the E-wing will be great, but it's at least plausible that it will be a viable ship in competitive lists.