>>723240442
Have you played a Long War mod before? It's basically a free expansion made by fans. The devs of Xcom EW called their own game a tutorial for Long war.
LWOTC is the same, it makes the Chosen more competent it gives them new actions, abilities, missions, ways to attack your havens.
It's just a straight up improvement over the base game but it does come with increased difficulty and play time. This is where you have to master the strategy layer to win.