Since global preview is ending, I figured I'd reiterate some of the major bugs in the spells (those that actually make a significant difference when using the spells, not just the ones I found in my attempts to drive Rigby to mental breakdown) that should probably be fixed shortly after the spells are chosen.
Fire Shard: Doesn't properly take defensive spells into account on the secondary shards.
Gar Zeng: Second and third blasts do not actually occur in PvP (though the messaging indicates they should). Can give nerve damage even if it misses.
Static Discharge: Does not properly take the caster's held mana into effect when casting on another's ES.
Aether Cloak: Doesn't protect against AE or Shadewatch.
Arc Light: Only lights naphtha on the target if you use <CAST TARGET> syntax instead of general <CAST>. Can <CAST TARGET> to light naphtha even if target is at missile. Takes the cumulative MR of the room, instead of the MR of only those at melee range.
VoI: VoI offers only one-way protection from hybrid spells; I can cast hybrid spells with VoI up, but any spells cast at me will shatter.
Frostbite: Only affects players whose names precede yours in the 'Also here:' list; anyone who comes in the room after you will be affected, anyone who was in the room before you arrived will not.
Paeldryth's Wrath: No balance loss even when the victim "stumbles blindly across the room."
Air Bubble: Dispite best efforts to prove otherwise, is still Air Bubble.