I been demoing the game to my family and friends and some have asked why the rules don't give walkers cover saves. I explained that the rules and examples only show and reference units/soldiers and not vehicles/walkers. I just wanted to make sure I had this right.

That's right in tactics walkers don't have cover saves. Tell them they are too big and it's hard to move them around fast enough to make a doge:D

On the flip side there is no bonus for hitting a huge target stationary in the open either, so it sort of balances out making the rules simpler and quicker. You could justify that even a walker behined cover is still a bigger target and a soldier and therefore still easier to hit.