Except we already have simplified rotations with SB (gotta reduce button bloat by adding more role action buttons, hurr durr), so not having positionals would be excessively bland without some other class mechanic to compensate. Like BLM abandons rotational complexity in favor of forcing you to either learn a fight by heart or be REALLY good at cooperating with your party through Aetherial Manipulation and Manaward. In fact, as a controller player, BLM is the one job that makes me wish I had mo macros instead of using a tank, a healer and a focus-target to macro-jump to.