No it won't be the same...but they could ALMOST copy/paste it from XI and make it work for XIV
Already has tank/dps stances in the form of Fan/Saber dance
Steps could be its raid utility debuffs.
The flourish system is basically the prototype of WAR stacks
Drain samba = bloodbath
Violent flourish = stun

Only real challenge is to implement all of the waltzes since you probably don't want them to work from TP and in XI they were instacast and uninterruptible.