With the introduction of micro intensive units that are supposed to be selected in clumps of units like Lobsters, I've realized how bad single unit selection can be in Zero-K.
1. Impossibility of selecting single visible units with a single mouse click when clumped up.
In this picture I can't select the Lobster even though all units are standing idle without pushing eachother.
2. Overlapping icons selection size.
Because of the above issue, it is sometimes necessary or easier to select a unit from icon view than zooming in.
Icons probably have a circular size. I suppose selecting the icon being layered highest makes sense, but something that is not intuitive, is the size of the selection circle and where it ends, and if a unit is even selectable from icon view.
3. In my opinion, it should always be possible to select a single unit in a group from straight above both in icon view and model view at some zoom level.
4. Icon view does not have selection feedback
With ordinary selection, you get halo highlighting when hovering over a unit or when drawing a selection box. It would be nice to have something similar in icon view.
5. One possible change to make single unit selection easier could be: Instead of always getting the unit on top, you select the unit that is close to a ray casted from the screen to the mouse cursor position in some combination of the size of the unit or icon, and the unit distance to the camera.