I down-voted the ticket. I absolutely don't agree with the 1 and 2 points. I believe you have managed to put a very poor arguments in there.
- Is not true on Arma 3 islands and if true in some scenarios (therefore bug) it should be fixed by fixing the LOS system and not by nerfing the AI behaviour.
- Absolutely ridiculous and unacceptable reason you put there (sorry). We should fix the AI shooting skills itself so that they are less super-human and not making them more stupid in their position selection in order to make them easier to hit.
3 and 4 are relevant points and could be fixed by timeouts before going prone or making cities CQB zones for which AI would have special behaviour. This would be very difficult to do properly IMO because there will be inevitable situations when you would love to have AI going prone even in CQB.