Knockback obviously has it's uses for ranged abilities, like Piercing Javelin and Scattershot, to keep opponents at bay. But what is the point of knockback with melee abilities, such as Puncturing Strikes?
The obvious answer is to protect us from melee opponents. Puncturing Strike has a 5m knockback. Unfortunately, 5m is still melee range in this game, which can extend to 7m with a couple abilities rendering the whole effect useless for those protecting themselves with this ability. Clearly, as it exists now, the knockback component of Puncturing Strikes is not having it's intended purpose of protecting the Templar. It grants CC immunity to the target of the ability and the small knockback has no real affect of countering melee attacks.
Therefore, I propose that if Puncturing Strikes must have knockback and produce CC immunity to it's intended target that the knockback distance be increased to provide protection to the casting Templar. Something on the order of 10, err.. 15m should suffice. This would take the opponent out of direct melee - the opponent has CC immunity and can still move towards the Templar, can charge the Templar, or attack the Templar with ranged weapons at will. However, the Templar will have had the opportunity to defend themselves from melee combat.
This is not without precedent, Scattershot has a knockback of 6m and it intended to be used at range. It's morph - Magnum Shot has knockback for both the user and target for a combined 12m knockback.
With this small change at least one Templar will be happy with Knockback on Puncturing Strikes. And that is one more than exists now.