But one could say that BnT and Thunderstuck are strickly for AE purposes - in which case you likely wouldn't be using Heroic Strike anyway - making Incite more or less null.
The same applies to Shield Spec and say, Field Dressing. In a scenario where you're hurting for rage (mobs aren't hitting hard), will the extra heals from FD really make a noticable difference? Or conversely, if you're getting hit hard enough to consider taking FD to increase your survivability, wouldn't you think you'd have near unlimited rage anyway? (Thus making Shield Spec null.)