So out of curiosity I was looking through all the old expansion to see which spells got updated with spell schools to figure out what the standards are.
Unsurprisingly I stumbled over a handful of inconsistencies (or just stuff that I don't understand because I'm missing the WoW connection).
For the purpose of discussion I'll list my findings here and you can tell me why I'm wrong:
Feral Spirit has no spell school, Dragon's Pack however is a Nature spell, despite them both being effectively the same thing.
Lesser Emerald Spellstone is a Nature Spell for some reason, despite no other Beast summoning spells are like this (I can only assume the argument would be that it is a relic imbued by Nature magic)
Lunar Eclipse is an Arcane spell (like all astral spells), but Solar Eclipse is a Nature spell (are sun-related spells Nature damage in WoW?)
Corrupting Mist is a Shadow spell while Corruption, the OG spell has no school.
Spirit Echo somehow qualifies as a Nature spell, while stuff like Ancestral Spirit or Soul of the Murloc don't.
Rafaam's Scheme is a fire spell for some reason, when all other Imp summoning spells ([Hearthstone Card (Summoning Circle) Not Found] and the ranked spell) are Fel spells
Inner Fire and Focused Will aren't Holy/Shadow spells respectively (is there some Priest skillset that involves mental training that isn't related to the LIght/Void?)
Bloodbloom is a Shadow spell when all other plant related spells are Nature (like Hallucination)
Rain of Fire and Dark Skies are Fel spells. Now I'm a bit colorblind so maybe this makes sense if both of them shoot green fire, but to me it always looked like regular Fire.
Lesser Ruby Spellstone is a Fire spell. I guess they were going for color coding with those, but it just feels like a bit of a stretch.
Subdue is not a HOly spell. Maybe it was neever supposed to be, but it always felt like on to me.
Convert is not a Shadow spell, which is weird seeing the artwork and how it clearly implies mind control shenanigans.
Webweave is for some bizarre reason a Shadow spell, which becomes even weirder considering Spreading Plague is Nature as you would expect.
Oh My Yogg! is a Shadow spell, which is strang considering all the other Old GOd relics from Darkmoon Faire have no spell school.
Shadow Council is a Fel spell. I know this makes sense due to the nature of the spell, but it bothers me to no end seeing how every other spell with "Shadow" in the name belongs to that school.
So that's what I've got so far. Anybody else got opinions on this?