Guild Wars 2

Greatsword
Hilt Bash – Applies 2 seconds of knockdown if used from behind or from the sides. 1 second stun otherwise.

Explanation: The greatsword should be more reliable. Hilt Bash already has a very short range to compensate for the control effect.

Longbow
Barrage – Apply a longer duration of cripple every pulse. Maybe 3 seconds each pulse

Explanation: This skill already roots the player for a decent amount of time, foes can leave the Barrage field before being applied with more than 1.5 seconds of cripple.

Warhorn
Hunter’s Call – Apply 1 second of blindness every second, for the duration of the skill.

Explanation: This skill already deals low damage. It needs to offer some kind of utility to compensate.
This suggestion fits the concept of the skill perfectly.

Very nice suggestions!