Thanks for looking into this. If you do create an issue or eventually a CL, could you please post links here? I’ll keep an eye out!
I can confirm that Search for References is pretty helpful, but even yesterday I was having trouble finding the actual GameplayTag usage in an asset that I knew from the reference viewer had a lingering use, so longer term either a Search For References that can show where in the file the usages occur, or a full fix for this search would be great.