The way the role system is set up lends itself to a lot of strategy actually. All the skills in it are useful in some situations but not all, I can see players wanting to optimise their role skills frequently depending on the encounter. For example: Healers won't want cleric stance while learning a fight, but once they have cleared and are wanting to optimise for farm, then they will consider taking it. Esuna isn't used for all fights, and they might consider replacing it for something like Rescue if it is a dead skill on their hotbar etc. (Healer is the only role skill menu that I remember, though I vaguely remember being impressed with the others as well)

Strategy has been reduced in some areas, sure, but it has been enhanced in other areas. I would suggest waiting until you actually play the expansion until you make a judgement on how complex the updated battle system is, because I feel like we will need to completely change our mindset regarding how we utilise it, and currently a lot of people are thinking with outdated logic, and clinging to how these changes work in isolation within the current battle system.