This is a great thread. I have spent some time reading all the ideas, and have had a couple of my own.
I would like to see the 3-d units to show the level of damage. For example, an armoured corps will have different icons to show readiness and/or damage.Full strength will have a tank icon, but when understrength (7 or less), they will show personnel carriers,providing they are motorized. When they are mauled (4 or less) they will become infantry, noticeable by the armoured symbol in the corner.
I felt the original 3-d icons need some reworking, but adding SS, marines and specialist units is too much. Their impact on the strategic war as a whole was not huge. The SS just had better equipment, marines are only as useful as their naval and air support. Mulberry harbours are of limited value as they would be destoyed! in any rough! water, hence the timing for 'overlord'.
Saying all that, I'm sure some minor tweaks wouldn't go astray.
Expanding the rail rules so they can be damaged/destoyed in sections by partisans ans SF, and rebuilt by, not engineers, but corps (30 days per section)?, effectively sapping the enemies strength
Always The Spectre of War