Since the patch, I find Heroic Strike:
1. Lowers my damage output
2. Lowers my threat
3. Depletes my rage fully when used with Inner Rage
I have actually spec'd out of Heroic Strike related talents, and seem to have a much easier time tanking.
Before the patch, I had "/cast heroic strike" in my dps macro, and pretty much had it go off every CD. After the patch, I find heroic strike completely useless (even as a rage dump), since the damage output and threat generation is minimal. If I use my excess rage to steadily spam devastate on every CD, then I get more shield slams off, and in the end --- I do more dps and threat.
Please only take the POLL if you are a serious raiding Prot Warrior (top 1000 on wowprogress).