I have been having almost the same problem, it's been going on for a week now. My error is something like this thought:

ffxiv_dx11.exe+17E0A8F
ffxiv_dx11.exe+1C59E7
ffxiv_dx11.exe+1BC2CB
ffxiv_dx11.exe+1B6728
ffxiv_dx11.exe+1B545E
ffxiv_dx11.exe+1AFDF2
ffxiv_dx11.exe+15FE0B9
KERNEL32.DLL+17614

Almost always the same, just the codes are different each times or the kernel32.dll doesn't show. All my drivers are updated and Windows is updated, CPU temp is normal, and overclock is off and I have never overclock my pc. I'm at loss at what is wrong and what to fix, the only thing I haven't tried is reinstall Windows. This error runs only on Final Fantasy 14, all my other games runs fine. 〒▽〒