A nice feature would be the "REALLY ALL ITEMS-Filter" and a "Hold Shift to take stack" keybind, to pickup all items of clicked type. But as it is, still better than the slow-*ss system from Arma 2, where you had to doubleclick your fingers to death or click the "Take" button to extermination.
As I said the system itself, is already a huge improvement, but on that "All"-part, its a step back.