One of the benefits that I can see to the LV approach to attach the cap iron to the blade in the new LV custom planes is that you can remove the cap iron without removing the carrier so it makes it easy to attach the cap iron back to the same position when you are done sharpening. However, having only seen pictures, I wonder whether you can sharpen the blade with the carrier still installed using one of the eclipse style sharpening jigs or whether the carrier gets in the way and you have to remove it anyway.
If you can sharpen with the carrier still attached, i can see liking the system. If I have to remove the carrier anyway, I can see it being more difficult to reset the cap iron than in the plane with the traditional non-carrier attachment.
Jeff.