Many say that the balance is bad, but its not. You dont use defense because you didnt know how right, you dont use grenadier because enemy dont use defense. You dont build T2 not because its bad, but because small radius of the planet not allow do this. We have only problem with T2 air, but its easily solved by increasing HP or maybe worth adding T2 bombers turret. And if you want to improve bolo/bombers against dox, it is necessary to increase bolo/bombers projectile velocity. But I think now is normal. And yet, that would make scouts important part of the game, you can reduce view radius at 1-5 less than attack radius.