User blog comment:Touchinos/“Our Father, Who Aren’t in Heaven” Discussion/@comment-79.115.72.235-20191215180054/@comment-10889355-20191218015226

Castiel is intentionally weaker in this season because that's what they're going to explore next—whether that's about Heaven's state or God's powers, I don't know. This has been shown in every episode he's been in so far.