Actually, they buffed the potencies on all of the healing gcds from stormblood to shadowbringers.
Helios 300 -> 330
Benefic II 650 -> 700
Aspected Benefic 140x6 -> 200x5
Aspected Benefic Shield 350 -> 500
Aspected Helios Regen 40x10 -> 100x5
Aspected Helios Shield 225 -> 250