Simple as that. Pls allow us to raise the level of immersion.
A hardcore mode hud would be pretty neat. Not just for hit markers, but the whole hud. Crosshairs, healthbars, nade counters, buff indicators. Get rid of all of it.
Hideing nade indicator would actually be kinda unimmersive, as normally a soldier knows and can always check, how many of nades they have left.