Hate to say it, but... practice?
DRG's GCDs "flow" as you describe because it's nigh impossible to mess up so long as you follow your 10-step combo ad nauseum. For RPR, the same, but 3-step with CD-GCDs.
The last thing MNK needs is to lose choice of Nadi banking or for Blitz to be an effortless mechanic. '3-of-same-from', '3-of-different-forms' is not hard.
