if you're looking to simulate an Endmill along the path of a Helix, it does simplify the methods we currently use (Sweep to a Sheet, and Thicken).
However, we find it's easier for an NC operation to use the Sheet body of the path, rather than the actual resulting solid topography. In that respect, we'll have to stay with our current methodology.
What would be nice is if this option allowed a "Create" option, rather then just Subtract and Intersect.
And obviously, it would be nice if you could simulate a Grinding wheel following the path of a Helix ... here's to NX12.
NX 9.0.3.4
NX 11.0.0.33 (Testing)
Windows 7 (Windows 8.1 Tablet)