Looks like the new SDK 0.4.2 has improved chromatic aberration correction and people are reporting a clearer image so I think I will update my sdk this time and give it a try when I get home. Not sure what they have done but it seems in the oculus config utility it takes note now of your eye relief.
Edit - There is also an updated runtime which you need to update the rifts firmware at the same time.
Edit - There is also an updated runtime which you need to update the rifts firmware at the same time.