Now that Butcher mentioned it, i actually noticed that most of the suggestions in fact come from CoH. I'm thinking that foliage on tanks would be cool, but it would increase the poly count on vehicle models that foliage on tanks will become a huge lagfactory. But to topic:
1) not needed or possible
2) indifferent for me
3) see above wall of text
4) it would be annoying mostly, but it would make tanker more careful of what they are doing.
5 and 6) another texture and model on a map to be loaded, adding up to loading time and lag?
7 and
no use, blocks the hull mg, see 5 and 6
9) GREAT for immersion, adds up to the texture load unfortunately
10) More deviation, yes, spotter view, no