Actually all abilities are designed to hinder enemy movement and get close to them due to the small cone of attack range. This class is designed to fight until the end. To make sure you´re opponent does not run away.
The Striker class can do hit and runs due to bleed damage and Leep slam.
Anyhows the Fighter type tree is for those who do not desire the circle strafing or hit & runs. its for those who want a brawl to the death.