How are we all finding subsonic rounds?
While I do overall appreciate them I don't think they're quite strong enough to warrant the use of them over another ammunition type and what a suppressor provides already.
Perhaps if using subs and a suppressor, weapons were a bit more quiet (-10%) than they currently are. Suppressor and using any other ammunition type the weapon was a bit louder (+30%) than they currently are, plus a minor reduction to muzzle velocity (-15%). Perhaps your time shown on the minimap when firing is heavily reduced too.
This gives a small drawback to just running a suppressor and gives subsonics a bit of a buff.
Since I've got you here it might be worth revisiting my old post in regards to ammunition and attachment combos concept, as it would be an interesting way to get players to explore different weapon builds.
Ammunition and attachment combos: concept/suggestion. | EA Forums - 13373023