Thanks for the response. While this doesn't quite solve the issue I've reduced the intensity by picking a thicker font and setting it to bold. Thank you!
By the way, just so you know you can alter ClearType settings in Windows to replicate how it "should" look on BGR (it will look ugly on your display while it's set this way, bear in mind). When you go to "Adjust ClearType text" in Windows and get to the first option for tuning, pick the right hand option. It will look blurry and weird on RGB but that's what displays correctly on BGR. From there you can test whether or not FAF's client is matching the way the rest of Windows is looking.
Again, I understand this is a fringe issue, so I don't expect anyone to rush out and solve this.