I’ve churned the gears in my skull plenty trying to come up with a better, more serviceable gender-neutral pronoun, but nothing as good as yours. Who knows, if it catches on, it might also be chosen by individuals someday.
Important clarification, Acsenray:
Is e meant to replace he and she, but not it? If so, instead of being gender-neutral, it would be the same as in Dutch and Swedish grammar, the “common gender,” which is still contrasted with the neuter. But if e can also replace it, then e’d be true gender-neutral.
English, Dutch, and Swedish all derive from Proto-Germanic, which has 3 genders. English retains all 3, but only in the 3rd person singular pronouns. Dutch and Swedish have collapsed the masculine and feminine into a single “common gender,” and retained a distinct neuter, generally.