While I applaud Square for giving tanks mounts for their hard work, the way these achievements/mounts are orchestrated is all wrong.
Tanks are still scarce when joining Duty Finder for Dungeons or doing runs to complete a relic (Chim, Hydra, and HM Primals). It can still take over 30 mins for a tank to show up and for you to be able to commence the duty.
When I heard way back that tanks would finally be getting mounts for working hard to do what they do best; I thought it'd be a tad bit better than the system we have now.
I know this has been out for some time and there have been countless threads in the past asking for change, but I'm hoping something changes or is done differently when Dark Knight gets introduced and possibly receives a similar type of achievement chain.
Small Edit; I put into bold what the Achievements should count towards.
Having these achievements only count towards end game doesn't help boost the tank population at all, all it does is reward existing tanks with end game FC's and statics. If the achievements were to change to include all dungeons and raids then more people would pick up the sword and shield or Axe and try to learn the job.