I would rather BRD, and MCH get walking casts in PVE than giving them to magical ranged. To me, walking casts seems like a mechanic designed with phys ranged in mind so it would be kinda odd to give it to magical ranged. It seem like the problems with the caster role right now is BLM being incredibly janky, the discrepancy in gameplay between SMN, and the rest of the magical ranged DPS, PCT still feeling a little overtuned and the 'rez tax.' Addressing those should take precedence over making spell casting easier imho.