I never played much stock or GWX without IO, so specific examples are hard to come up with. But in general what I see that it's doing is making more "order" options immediately available when you click on each of the officer icons.
Also all the icons that do come up when you click on your officers come up right above them for quicker access with the mouse. IIRC in both stock and GWX w/o IO, some groups of icons would come up in the lower middle portion of the screen instead and were noticeably bigger than the IO versions. Considering that they tend to stay onscreen until you click elsewhere, it kinda obscured more of the view than was really necessary.
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