I just want to share what I experienced and what I liked most parts in main story line. I always love to see villains fighting each other or at least not always WoL/Protagonist vs antagonists. As far as I remember, there are some very good cutscenes happened in FF14 that really made me stand on my seat and pause because i am hyped treasuring the moments especially enemy vs enemy scenes. I will rank them based on their awesomeness lol.
1. The first time I am really overjoyed was first encounter with Ravana in his domain. Ysayle transformed into Shiva to challenge Ravana into a duel to stop Gnath invasion towards Dravanians. Well, that fight is really AWESOME! Primal vs primal omg it was an epic fight. The cutscene was delivered exceptional for me. (the bgm too!)