Cover is nice to have, but it's easier for defenders to shoot down the attackers behind some cover. Either both sides get to use it or neither side. Also ticket disadvantage isn't as big of an issue as people make it seem to be. I mean in the time given I don't think there was a time in these line battles were a side lost due to losing all their tickets, and it the killing only stopped due to the timer. I'd say just start from the beginning, and keep how we deployment the same. If a side can properly maneuver, and lay down fire then the point you bring up aren't needed.