Not really. An arms warrior won't use a significant amount of auto attacks during the "rotation" because slam is used to delay it and everything else is a GCD that doesn't run on haste. For Fury it is important because a lot of white damage is needed when the GCDs are on cooldown. For Arms, there isn't really any point when you won't have an attack to use.
If that makes any sense.
The general consensus among players on this site is that Weapon Mastery is essential until you are soft capped only then can you move those two points into Imp. Mortal Strike.