It's still really hard to select orbital units. It can even be hard to select ground units because you might end up with a bunch of fabbers selected as well. Are there any mods that make dealing with this easier?
https://forums.uberent.com/threads/rel-keybind-extensions-1-3-1-86422.68478/ or https://forums.uberent.com/threads/rel-strategic-filters-2-0-0.67954/ I haven't tested those functions yet.