Couldn't be possible, that the values of the distance moved by the mouse are rounded, if no reference point is used? How much it is rounded could be calculated by the shifted value (for example values between 1 and 10 could be rounded by 0.2 ...) or could be calculated by the viewport scale.
Attached two screenshots from the old ProDesktop during extrude different sized circles. The increment of the big circle extrusion is 2 and of the small circle 0.1.



This CAD software made by PTC was very well-thought-out and I liked the workflow. Could be nice to see some features at MOI. An other feature of ProD I liked is, that if an edge is selected and the user click the right mouse button, than a context menu popup an showed all possible commands for edges - at the example here it are rounde and chamfer.