I was thinking that they need to come up with unit upgrade cards. You all know what I am refering to. It would be cool to add spotter ability to bot hunters, or agility to the bbq squad. I know it was done in 40k as wargear cards in for heros, but I think a squad upgrade card could add some new uses for squads and keep your foe guessing "are they a standard squad or upgraded?" The card could also be block specific or only a single card of an upgrade in the set. Think of the possiblities.
Red guard command squad with a power tool to help take out walkers in close combat. Damage resilence to Red Devils or grim reapers.
Fantasy flight could do it as a print on demand type expansion. Please Fantasy flight make this happen.