While I'm generally for the stated policy goal here, I'm not sure how far from the status quo this "new" policy actually is. My personal experience with stuff like this is that leaders who are fair, transparent, and engage in honest dialogue with would-be complainants are largely immune from the kinds of weaponization of the IG/EO that SD is describing.
I've had military members threaten me with an IG or EEO complaint. My answer is always: "By all means. If you feel like I've been unfair, or that you've been discriminated against, file your complaint and we'll let an impartial investigator determine the facts."
You'd be amazed how quickly people back peddle when their bluff is called. I've had zero actual complaints filed against me.
Interesting note on how this all works on the Gov't Civilian side... If a civilian files a complaint, the DoD HR people handle most of it, and are generally very protective of the Government. We do a lot of memos for the record with our litigious problem children to document leadership's position on why certain decisions are made, etc. Another extremely valuable tool to insulate an organization from weaponization of EO.