The only thing I thing that the game lack for the balance are better constructed tables. Way to climb, putting objectives on rooftop, saying that when you are intercepting, you have to be intercepting at range 1 ON THE SAME FLOOR, etc.
Getting ride of the "blue players come with all cards to create battle" but more something like "each player nominate 2 cards of each type, and you create the "decks" with them". This will allow a less "one way" before match set-up.
The pass mechanic would be cool too for the players with less activations.
And as @TauntaunScout said : the blue player may be the one with less activation.
This way, you are correcting the "bid" issues where it is more interesting to have up to 10 points less than 800, than to be closer to a 800...
I am from those who think that no unit is unbalanced or utterly broken (in a good or a bad way). But lot of easely impactful thing around the minis themselves can be touch to balance the game.