Wat. Have you stepped into Savage (or even Coil) or PvP? The 10% damage reduction is pretty significant when you're taking unavoidable damage in magnitudes of 5k or more. It's not killing dps regardless of now, but it's still pretty damn helpful to lessen the burden on your healers.

Mobility is also pretty important when avoid some mechanics during periods of time where you can't attack (or sprint for that matter) and especially in PvP where only ninja at the moment has a natural increase to movementl