In the latest patch notes for the April 9 Hotfixes, Blizzard made a substantial change to Powershot on live:
Powershot now has a 25% decrease to damage, cast time, cooldown, and focus cost.
We of course don’t have any explanation for this, though I suspect it’s partially a desire to reduce the uber one-shot damage in PvP now that the shot is always hitting. To compensate for the damage reduction the shot’s cast time is shorter and it has a lower focus cost. Honestly, this still isn’t going to be a very desirable shot in PvE situations (in raids we can better optimize our DPS with Glaive Toss with the bonus of not having to worry about standing still, and in 5-mans your tank will kill you for knocking all the adds back), so I’m going to qualify this as mostly a PvP change.