When printing ABS I was having a lot of issues with parts warping, mostly the outer walls or a corner. The fix was prety simple. I now add an 8mm circle 1.2mm high that is offset from the part no more that 1mm and attached to the part with a 2mm wide tab. These are easy to snap/cut off then sand down and as a result I have prety much eliminated any warping issues.
Now this would be a great feature to add to Simplify3D. It's much the same idea as adding tabs when making things on the CNC.