This definitely works and resolved the issue for me. The key is to set the Force Pixel Alignment option and then ensure the artboards are integer aligned in their transforms (no decimal/fractional values) on the Designer Persona. Then, when switching to the Export Persona, the blue status bar at the top of each artboard display should indicate proper export sizes. If not, ensure the export slice boundaries have not been modified from the layer slices: in the upper left of the Designer interface, just under the Persona icons, "Slice (from Layer)" should have a button option that is greyed out "Revert to auto sized". If it is not greyed out, click this to ensure the slice size/location matches the artboard layer.
