Some ships are used extensively for competitive play while others are not. I'd like to compare two of the existing ship to find one reason why, then apply that criteria to three of the wave four ships. That may give us a hint which new ships are viable for competitive play.
Attempts at finding points formulas for ships seem to indicate that the action bar does not effect points cost while the value of maneuver dials is hard to figure out. Each point of PS costs 1 point.
TIE Fighters are the mainstay of many lists. TIE Interceptors are considered high risk ships in spite of having one of the best maneuver dials. The main difference between the two is +1 attack for 6 or 7 additional points. The cheaper one gets used but the extra cost is not worth the benefit.
Compare a TIE Advanced to an E-Wing.
The TIE Advanced is arguably the worst ship. From the above comparison between Fighter and Interceptor we learned that +1 attack for 6 or 7 points makes a ship less useful. Add 7 points to the TIE Advanced for +1 attack, substract 1 point for lower PS and you get an E-Wing. (1) So the E-Wing is not as good for competitive play as the TIE Advanced. Which is saying a lot.
The system upgrade may improve the viability of E-Wings. Naked B-Wings are very useful so I would not count on it.
The TIE Defender is an E-Wing with a hull upgrade. So far you hardly see shield upgrades in competitive lists so I doubt the Defender being better than the E-Wing.
Compare X-Wing to Z-95
The X-Wing is a Z-95 with +1 attack for 6 additional points plus hull upgrade. This indicates that the Z-95 is a better choice for competitive play than the X-Wing.
If the above reasoning holds true, which it probably does not, I can see the Z-95 becoming a major contributor in rebel lists while E-Wing and TIE Defender take a back seat.
(1) The difference between three shields two hull and two shields three hull is worth a maximum of one point, probably less.
Edited by dvor