Why change something that works?
I am happy with the current Power Sword variants. The “inconvenience” of having to repower it is offset by the potential damage you gain. The Powercycler Blessing is a janky solution, but its existence makes sure you cant combi some potentially busted Blessings. The garbage dodge distance and counter helps further pushing the PS into the “win harder” category as does its general ineffectiveness when it is unpowered.
It is in my eyes one of the better examples of how to balance powerful weapons with a unique spin that affects it negatively.
Ontop of that it does play into the setting that we have Power Swords that kind of work, but are not fully functional.