A patch for Elden Ring DLC Shadow of the Erdtree has been released that revises the scaling of the Shadow Realm Blessings.
The DLC includes this new scaling system to boost the attack and defence of both your character and your spirit summons, by collecting Scadutree Fragments and Revered Spirit Ashes respectively.
Now the scaling has been revised so that the effects are greater for the first few levels, before becoming more gradual later.