That's exactly what we mean by lock outs. I repost here the inconvenience I identified a few posts earlier :
While I agree that it forces a structure to learn how things work, when you DO know it works and what the structure is since ARR/HS, it becomes a burden instead.
Picture 1 : Aetherflow is about 20sec before being available again. You’re about to hit transe, but boss jumps for 15s (example : gravity on O2S).
When you’re back at it, Aetherflow AND your trance are available : so you either ditch the second (trance > DF > AF), or wait a whole 16 seconds before using AF. It was not the case in HS, you could AF just anytime available and not lose precious seconds of it being available.
Picture 2 : To maximize Bahamut, you need aetherflow. When Bahamut is available, aetherflow is about 30 to 40 seconds on CD… so you wait and it just doesn’t feel flowish
Picture 3 : you forgot Stimulation for 15 seconds. When you see it, it’s time for Bahamut. So you wait after Bahamut and lost 20 seconds.
TL;DR : The lock outs are fine on a dummy, they’re a real pain in actual fights with mechanics, boss jumps and tweaks needed in the rotation. To play well you have to know EVERY fight. You can’t just go blind and do well because of the tweaks you need : the lockouts make you very vulnerable to them