Two things come to mind:
1) Tuning hasn't come to pass, and
2) Bladestorm is still the AoE talent of choice. Clear winner over Avatar and Bloodbath might be good when paired with Ravager but Bladestorm would still be better burst AoE.
I like to think that things have their niche. Shockwave is the prime stun talent. Stormbolt is the prime damage ability I could even see removing the Stun component entirely in favor of Shockwave. Dragon Roar doesn't really have a niche, but two primarily damage talents on the same tier is no bad thing.
I just don't think every talent needs to be completely competitive for damage with one another as long as they can bring something to the table and be inherently useful. For one, Shockwave would never be competitive damage just because of its inherent heavy stun component. This is why Stormbolt only does extra damage on stun immune mobs. Even if Shockwaves damage went up to the point of AoE competitiveness, do we really need three AoE talents in Shockwave, Bladestorm and Ravager? I imagine we'd start running out of GCDs.