My current gripe with the current dots is that in 127v127 mode there are so many friendly dots on your screen that the QOL when playing is worse, by adding this feature players could change the opacity/transparency so its less intrusive/in your face. This is because currently when fire fighting i sometimes think the enemy player is friendly due to the bright dot through the wall(s).
Coming from a hardcore infantry player in BF4, this sorta thing already exists in BF4, and when playing infantry only maps e.g. Locker, being able to change the transparency makes it so i guess more often than not that the player is an enemy and shooting them rather than having bright dots(triangles in BF) and guessing its a friendly and not shooting and then dying from it which can be frustrating.