I think the issue with it is how often you have to hear it, plus how much better (objectively) some of the zone music is. And it's also a kind of merry music, which for some mounts doesn't really suit. FF14 gets past this by playing different music for certain mounts, like the Garuda theme when on the mount you get from that battle.
I don't hate it. I just prefer zone music in most cases.
Edit: The same thinking can be applied to Campaign music in the past zones.