The Give All Item in the essence tab doesn't give you all the essences. It misses quite a few, at least in my case. Namely Demifiend, Metatron, Belial, Trumpeter, half of the Aogami ones, and a few others.
Also, how do you edit skills? The values on your spreadsheet don't match the values on the demon skill tab, unless I am not reading the spreadsheet correctly.
EDIT: In addition to not adding all the essences, there is also a bug that incorrectly displays your essences in-game IF you had acquired and used the essence BEFORE you edited and readded it through the same editor. For example, let's say you got Nuwa's essence and you used it. Then you proceed to edit your save with the editor and you add Nuwa's essence again. In-game if you go to the essence menu you will see that there is no Nuwa's essence. However, if you go through the Cathedral of Shadows apotheosis menu and try to fuse a demon with an essence, it will correctly display the Nuwa essence you added via the save editor.