I use flash with virtually all my small songbird photography.
Even using a Better Beamer, I usually need to avoid FP mode.
I'm shooting 700 or 850mm. Even with a 1/250s flash sync I'm pushing the edge of that envelope. A 1/200s flash sync will just make matters worse.
Most of that work is hopefully fill flash, not fully flash exposure, so the flash does not usually help "freeze" the image and those full flash images are never the best images.
I just posted something about the missing AF-On button. This camera is definitely not wildlife-friendly, at least the way I have shot wildlife for the last 6 years.
This may not be a "Pro" camera, but the fact is that very, very few people are making serious money with wildlife photography. Yet amateur and "pocket money Pros" spend huge amounts of money on gear specifically for wildlife. Most of them cannot justify a D4, especially after the cost of the lenses needed. I don't think Nikon thought this price differentiation through. They have left us mostly amateur wildlife shooters out in the cold.