Nah, if your not paired up like in Awakening and your units are like you describe it is always in attack stance. However if you choose to pair up two units effectivly becoming one, they are on guard stance.
Again you might remember FEA? Even though you didn't pair up two units you could still get a support attack by having them positioned like quote related. That is now called attack stance.
Actually pairing up in FEA is now guard stance with the limitation to dual guard and no dual attack. Also guard stance negates any incoming dual attacks.