I looked and didn't see this previously requested.
I'm looking for the ability to have the "Pointing Up / Normals" slider to work with the grouped curves host when the curve is non planar (up on the Z). This will help when placing objects along a curve which should follow the slope of a terrain. i.e. curbing along a sloped road or hedges along a sloped flower bed. Currently objects step up a hill when following a curve.