1. Yes, many would like this.
2. No, irrelevant
3. Trains would be interesting, but unlikely
4. No, also irrelevant
5. You can have this right now
6. Um, no...
7. You can take all the screenshots at level 1 you want right now.
8. No, it would affect nothing in daylight, LOS at night is already affected by good weather versus bad
9. Would be nice, though could unbalance a battle greatly if one side has bad luck. No big deal against the AI, but a big deal versus a human opponent (as an aside, KT was actually quite reliable, slow due to being underpowered, but after initial mechanical bugs worked out, getting off good roads and bogging was the main thing that kept them out of combat)
10. Repairs are out of the scale of the time frame of CM battles, and casualties represent just that: dead, severely wounded, moderately wounded and lightly wounded but unable to continue in combat. Additional categories serve nothing. Troops can either fight, or not, for purposes of a tactical battle.