Earth has only two Earth-Type damage spells, which makes Earth Resistance pretty underwhelming compared to other resistance types. (
See thread for details.)
Witchcraft is a school for buffing/debuffing, but it doesn't have a lot of buffs (Oath of Malediction, Absorb the Elements, Resurrect). It could probably use more spells in general.
There may not be a lot of new things added before release, but hopefully, after the release, some new spells will be patched in.
