Currently printing a 2mm high model. Only with Simplify it's going to be 1.9mm high.
Why? I'm printing at 0.2mm but my first layer is set to 150% (yes, I really do like to do that and it guarantees perfect prints over the whole bed area).
So why not have a checkbox in the Layers tab for "auto adjust layer height to achieve perfect Z final layer"?
Basically the slicer would adjust by a tiny amount the height of each layer so the final extrusion height would be achieved.
In this case the layers might be 0.2125, for example, so that with 8 of them + the 0.3mm first layer we achieve 2mm exactly.
Of course S3d already can do this sort of thing horizontally (adjusting track width on the fly) so not only makes perfect sense but is entirely coherent with Slicer function