Note: you can see a full updated list of all 5.2 hunter changes here.
Great news for all the hunters out there frustrated as all heck with our awesome level 90 Powershot not working: it looks like Blizzard prioritized getting this fixed for 5.2 and a rebuilt version of Powershot and Glaive Toss will be on the PTR soon. Taepsillum tells us on the forums:
Both Powershot and Glaive Toss have been rebuilt and should now always hit their primary targets, plus, they should also be much more responsive to secondary targets.
This new implementation of the two abilities isn’t on PTR yet but will be as soon as both abilities have been through QA. Once we have a new PTR build go live, feel free to test them and provide us with some feedback, this is when it is most important and when it can dramatically change what ends up going live.
The issue with Powershot was that it didn’t necessarily hit the target you were shooting at. This caused a bit of confusion early on, since it worked fine on the target dummies, and it quickly became clear that terrain and movement were the keys to the problem. In other words, it shot in the direction you were facing, rather than at the target. Thus if your target moved in the course of the huge 3-second cast, you didn’t get your shot (or any auto-shots, which are turned off during casting). Suffice to say, this made Powershot pretty poor in PvE and totally useless in PvP, where the shot would otherwise be much more desirable.
Blizzard said that it would actually take a lot of coding to fix, so it couldn’t be a quick fix, but then also said that it was a “skill shot” and implied it was working as intended. This really smelled to me like “oops, this doesn’t work — let’s just say this is the way it’s supposed to be.” Happily they did indeed rework it — possibly due to all hunters skipping the talent as a result — and it looks like we’ll very likely have a functioning Powershot and improved Glaive Toss in patch 5.2!