I play on Bahamut, i've been keeping tabs on our server population since before the FF14 release date. It has declined drastically since then. This past weekend during peak NA hours the population never exceeded 2000, recently with the blazing buffalo bullcrap that came out during JP hours we've spiked to 1400 when it was around 400. But for the most part since FF14 release all servers have had a major decline. But i still think of my server as fortunate to even see 1k people during either NA or JP peak hours, even if it is still a small number compared to how it was a few months ago