Unlike all other gauges, MP starts full, and regens with time instead of specific actions. I mean, you can definitely make a gauge work like that too I guess. But I'd actually like them to make MP useful on more jobs like it used to be, as a more universal system BESIDES job gauges. Because removing it just has that somewhat familiar taste of asking SE to remove things like TP because it's not satisfying or working well anymore... (if the TP analogy irks you, you can replace it by whatever they deleted and that you liked)