It's a boring capstone skill, especially compared to Macrocosmos and Pneuma which are neutral damage on single target, damage gain on AoE, on top of having extra healing/defense utility.
It's a capstone skill that fights itself by design (the sprint means you need to move to dodge mechanics, making the defense buff weird, or you need the extra defense to absorb a bigger hit making the sprint unneeded).
They said that the sprint wouldn't be significant to prevent SCH from being mandatory.
They didn't fix the problems with SCH other than the Fairy supposedly being more responsive to commands.