Would be great to get a tool that could diff(erence) two JSON files, with the output being a grid of gray boxes, each gray box represents where a top level element is the same between both, and yellow box represents some sub-level item inside the top level item is not the same between both, blue boxes represent where a new top level element is only present in the left side (added), and red represents only present in the right side (deleted)

You could visually diff a whole lot of reports, pretty much instantly. Our PM had a paid tool that could do this, but wasn't sure what it was.