Wave 7 was announced in conjunction with the promise of support for Competitive Epic tournaments and is timed to coincide closely with the release of the Raider. I understand that this forum is mostly focused on the 100 point death match, but I believe this wave was heavily tested in the Epic format.
In my admittedly limited experience with Epic game play, one of the problems I witnessed was how my attempts at conducting a classic "bombing run" on the capital ships usually resulted in my bombers spending several rounds close enough to the Corvette to get rammed by a competent capital ship pilot. The K-Wing SLAM and the Punisher native boost both seem intended to help with this.
Additionally, notice that both of the new super bombers have an Agility of 1? Now the incoming threat to the capital ship is also the same ship that the primary has the best chance of hitting, even at Range 5 due to the recent capital ship primary weapon fix. And I'm willing to bet that primary weapon fix came about during play testing of these new bombers in the Epic format.
On a related but separate note, another frustration for many is the uselessness of the X-Wing torpedo upgrade slot. In the lore, torpedoes weren't used in dogfights but instead on capital ships (and Death Stars, of course!) When you're attempting to focus fire a Corvette, would it make more sense to pay for torps on X-Wings, compared to in any 100-point situation? Or does the action economy ruin the torpedo attack on a capital ship just as much in Epic as in dogfights?