No offense, but I don't think you see how effective it can be and/or how to use it right. Perhaps it doesn't fit your play style. Of course it doesn't lost long but with intense 1v1 fights the 0.5 second benefit you have makes a HUGE difference. You can't communicate with your team how to "place your aim".You're talking as if this is a long lasting AA when really it just gives you a short burst insight into the players actions. I never said it would be pointless overall, it of course has benefits. What I mean is other AA's server a better purpose when paired with good teamwork. Hardlight tends to keep peoples attention while your team can pick up shots, Jetpack can allow you to get a last headshot when in a bad angle, and so on. Not saying PV is completely useless, it's just not as useful to someone running in a group with good communication.
You are saying Jetpacks and Hardlight are more useful... Well to be honest I think the opposite in most cases. People with Jetpacks are extremely easy to kill as their movement pattern is more predictable / they are slower, Hardlight people are just easy to kill with a grenade.
(I am talking 4v4 with skilled opponents now, not BTB or so)