Originally Posted by MammonAzrael
Why doesn't the Fey heritage feel all that "Fey" to you? What sorts of things were you expecting? Remember that most of the abilities need to be fairly passive, otherwise they'd make more sense as invocations.
I can't necessarily explain it; I've just spent so much time reading folklore for Fae-o-matic that it feels kind of off. Partly because standard D&D fey would also possess fome kind of charm ability.
I could see the "natural world messing with you" feature split over two different grades in place of the invisibility one and that taking its place: perhaps an entangling effect [i know Freedom of Movement is a problem there, but it does hinder spellcasting and FoM is kind of broken anyway] for the first power and then some kind of full on damaging binding later on [the Complete Divine version of Briar Web should serve as a nasty basis]
In real lore, i've only really heard of invisibility while they're hiding after messing with you, laughter pouring out of nowhere, possibly why the Greater Invisibility doesn't seem very fairy-ish.
Those are just the thoughts of someone who's spent far too much time reading about/designing fairies.
As an aside, you mention the fire giants elemental link in your response on the giants thing [which may as well be called "Titan bloodline"] and i'm wondering if you have plans to add an elemental chain. It would certainly fit and Antimony from Gunnerkrieg Court
could serve as inspiration.