To be honest "a perfect storm" is coming for FF14. The current plot is almost done (could lead to some player feeling "done" with FFXIV) and Blue Protocol is shaping to be real competition for FFXIV (PvE focus, story driving, aesthetic, share many similarities with FFXIV, etc). I know Blue Protocol will be F2P and FF14 is very "play something else" friendly but you never know.

Then, Shadowland is shaping to be a good expansion so I'm guessing a good chunk of "WoW refugees" will be going back there. Also, will be outright sad that WoW end with better character customization than FFXIV (I still think FFXIV chars are more charming).

I really hope SE uses all of this to modernize a little bit FFXIV with better lighting, textures and more detailed models/environment.