First, there never was much of a danger to begin with. In rare cases Chinooks had guys get shocked but they didn't use the static wand. In Black Hawks it is recommended but we never used it and never once did I have someone get shocked.
Second, you can always do a self hook up and land next to the load. Crew chief gets out, grabs the clevis, slides underneath the aircraft and hooks it up. If it just so happens to be the rare case of an LZ that doesn't support a landing, then the crew chief can reach down with a shepards hook, snag the clevis and pull it up to attach to the aircraft load beam.
Third, unless you're slinging heavy equipment, real world ops are drifting away from sling loads. It faster and safer to take supplies internally to a mountain site than having to place a load down in a cargo net. Also if it's special ops or anyone traveling light, well now they have an expensive and heavy cargo net to tote around.
Finally, the trend in sling loads is going in the unmanned direction anyhow. No one wants to have the added risk on their hands of having a crew hovering at high altitude in a combat zone. You're a sitting duck for sniper fire. This new sling system may work for heavy equipment or vehicles but there is no reason to reinvent the wheel when there was no real danger to ground crew to begin with. Another waste of money for the Army. They need newer more advanced aircraft like the Osprey or the Raider, not minor improvements to existing aircraft.
