You don’t really want this because it will cause misalignment to party buffs/debuffs because then everyone in the party would have drifting party buff windows.

Additionally this would be incredibly hard to balance around because potencies are established around a skills set recast and being able to stack SKS to reduce power skill recasts could make a mess of things. Not to mention this could greatly devaluate job gauge driven skills that are balanced around the current set recasts and resource generation rates.