Celestial Concerto bard song super bugged

[O-louth]

I am not sure whether it is intended or not, but the Celestial Concerto bard song is barely giving any benefits.
It offers an unknown ac vs evil, I get a fortitude icon, and I see +1 divine damage vs. evil.

I am pretty sure @SpiffyMeister tweaked it a bit, but I see no changes to the bard page of the song.

If not a bug, then Id say that compared to Vanilla bard song, it is much worse. Essentially, you switched out all perks to become vs evil only, but in return got divine damage instead of bludgeon.

[SpiffyMeister]

I gently buffed its ab, mind saving throws, and AC, and a mild dmg boost at the later levels.

It's divine dmg and thus unblockable, thus it is a much better song than the default.