Just to give a little update: I tried pvping with my Hunter2 and what seems very obvious at least is that once your target is in coursing/retrieve, the attacks that come within the attack duration can still be dodged. I think I also noticed the attacks being blocked, but less commonly (confirmed). The duration also seemed less than it was supposed to be or perhaps in some way it got resisted. (needs further testing, or someone clarify)
The biggest issue imo is that your pet doesn’t recover stamina after every fight and you can’t feed it either. It doesn’t make your pet unusable, but it does mean your pet will have a handicap after every 1st round. (assuming it died lol) UPDATE: New update has fixed this.
I’d say that despite these issues, so far I don’t regret taking Hunter2. The window of time it gives you to kill your target is big enough. (assuming you aren’t rank 5 like my Hunter2 is LOL) Rush dog can also be used while cloaked and not break your cloak.
Edit: No good against multiple targets (auto attacks summons, objects) btw but hopefully the new patch (from KToS) will fix targeting.