My Idea of the K-wing is as following:
Hull: 6 maybe 7
Speed: 2 maybe 3
Antisquad: 2 dice
Antiship: 2 dice, maybe 3 dice if they are all red
Keywords:
Heavy
Bomber
SLAM: When activated you may move up to speed 4 (or 5), but you can only attack after you have moved and you most remove one die from your attack pool before you attack.
Or
When activated you may move at speed 4 (or 5), but you can only attack once in a turn and you cannot be Unactivated.
I want the K-wing to be better in the attack than the B-wing, when it runs at its normal speed.
But when it use its SLAM I wanted to give it a disadvantage as a trade off for using the SLAM keyword. So that its not to OP while indirectly keep the cost down.