I've always wanted to play a snipers pro. Limited ammo, radar on but people only show when a shot is fired etc.
By placing snipers on weapon spawns, you promote map movement, limited ammo means people can't just pick a hiding spit and just stay there till death. They'll actively move around and the best sniper will get the most no scope kills while moving etc. The shot only radar would be good to weed out the people who still camp. Now it's not like cod where you have a view over the whole map and see exactly where a person shot, but if your close, you can see where a sniper is. And if you're far you can sort of see a direction etc.