He shells for helicopters, planes, APCs and tanks in real life have good splash damage (Fragments (for 30 - 40 mm HE shells - for tanks it is more) spread and rip apart enemies at distances up to two meters from the impact point).
In arma 3 HE shells have to just about hit the target to kill them.
This is unrealistic and irritating for vehicle commanders.
Please fix this by increasing the area that fragments from HE shells damage and kill other players.