The tactical map plays a lot like a boardgame with miniatures such as Descent Journey into the Dark.
In these games 2 actions per turn is very normal. But on top of that you have the fatigue system.
Fatigue allows you to move one extra space on the board, or add some power to an attack. Fatigue is limited and requires a rest action to fill again.
I would really like to see something similar in Phoenix Point. To be able to exert yourself to move that extra step to high cover and that it works like "energy" to trigger skills like run and gun or increase range of your grenade throw.
And you could lose maximum fatigue when you are hit in legs/arms.
Anyways, just push yourself a bit harder on the right moments, and decide to take it slower and recharge a bit on other moments, would add to strategic choices and lasting effect of those choices