For everyone thinking of switching to Flying Blue, I have added the option to calculate earnings and lounge access for Flying Blue. There are still some edge cases that I haven't programmed (e.g. OK has a minimum mileage of 750 miles instead of 500 miles).
In my testing, I haven't found many situations where crediting to Flying Blue makes a very large difference (outside of the edge cases in revenue-based vs distance-based calculations), so the grass may not be greener on the other side. International Sky Club access in economy is now a big differentiator though.
You rock man. I agree for most US flyers, it doesn’t make sense. I’m only doing it because I’m already almost exclusively Air France flyer that was just crediting to Delta or the GUCs.