RE: protected hexes
Protected hexes are actually tied to a specific reinforcement rather than a hex. So there could be units arriving at a hex without a protected value. As noted the impact is when reinforcements arrive, but only if that reinf has a protected setting. The shading shows the coverage of all remaining reinforcements, so if reinfs have different protected ranges, and the remaining protected range is smaller for a specific hex, the shading could shrink - but it would never grow, unless strategy choice reinforcements can have protected hex settings. I believe they can and so that could give away a strategy choice, if so! But the shaded hexes would only show from a selected strategy after it is selected - prior to that, the units would not be in the list of reinforcements and wouldn't show protected hexes.