Maybe i'm the only one crazy here but i never ran out of MP on WHM during Shadowbringers and i never used Thin air for anything but a emergency rez that happens directly after i was rezzed myself (and thus had too little MP to rez myself) which the new Thin air also achieves. During regular combat Lillies & the occasional OGCD's being free heals + Assize + Lucid dreaming was enough to keep me topped up. Knowing SE the best you guys can achieve with complaining about it is to revert Assize to restore 10% mp again.

The only thing i can agree on is that the Thin air change makes Cure III even more questionable as a tool to have.