Now that you're not able to add spells to this addon, a lot of covenant abilities are missing, some are here and some are gone.

I'd also like to suggest the ability to modify cooldowns on existing spells

I'm not happy with this desicion, but I had to remove ability to add/edit cooldowns. Why? Because maintaining lists of default spells and user-defined spells and modified default spells is too difficult to implement without distractions for users.

All main covenant abilities were added recently. Is there something I've missed?

Just came here to see if its possible to added user spells in the lua files, "kleptomania id:198100" is missing for mage pvp talent.

Divine Toll is a massive ability to forget, that's my biggest concern with missing abilities, I'd like to see soulshape and chain harvest as well.

@cameronlb Kleptomania is passive talent that increases cooldown of spell. NameplateCooldowns cannot determine (in reliable way) that player has this talent.
@Resune Added Divine Toll and Chain Harvest. I'll add Soulshape later.