DPS Warrior Specs

[bonemage]

I can't envision using a shield without Improved Shield Bash. It locks out one school for six seconds, silences all schools for three seconds, and dazes which sets them up for the Heroic Strike combo (my HS rivals my Shield Slam, and I use a 1.60 speed weapon.) I suppose you could skip it if you're purely PvE, but even then the silence is useful for dragging caster mobs a little closer or preventing them from casting some kind of nasty spell (like an AE fear) just before death.

The daze aspect of shield bash has nothing to do with the talent, that is the skill, but your other points are valid.