I think calling it an "Inner Release" is aptly named in this case. It always boils down to "spam this button 5 times", granted PLD now presses a different button at the end of it but the original design of Requiescat was exactly that. Sure, you could press something else, just like you could on warrior but that would simply mean you're doing it wrong on purpose.
You're also not building up to anything, that's what GNB does, you're simply popping the cooldown and spam away. PLD only slightly differs in that it technically still has a cost attached to it but this cost is irrelevant due to it's rotation.
