The music for 1st/2nd boss indeed sucks because.... it's been cut in half, inexplicably. We only get the intro, looped...
This is the full version : https://www.youtube.com/watch?v=5yK3X8su3oI
There is another theme (the "panic" theme
when Crystarium get attacked I think
that's been cut in half and it's ridiculous since it only last 30s instead of 1 min.
The soundtrack of FFXIV is nice, but the "music direction" is next to inexistent (outside of some boss battle, like Nidhogg). The worst offender are cut-scenes where they randomly use and re-use the same basic themes since ARR and don't hesitate to put 2 themes in a < 1 minute cut-scene.....