I like the game how it is. I really love it!
But I see something coming with those phases:
The Idea of having my Superheavy entering the game only in the last 5 minutes of a game, drinking coffee while sleeping onto the front and having, either in a win or a loss situation, no time to show more than how pretty it looks.
Somehow, I find that heavy tanks are on its best glance, if they survive and shoot the whole game, while being supported by the rest.
But that is not serious (for me).
I only remember that the superunits in battleforge were game closers, and you never had a worthy competing army to show their enormous power, because either the one or the other force was dead in a second, and you had no real fights, but the first glimpse of those creatures already killed the players... the one succesful player won, and the others surrendered before the game was finish.
Not sure, if I am allowed to compare those 2 games though...