Max HP and common elemental resists makes fireball less useful than it used to be.
Have we ever considered raising the damage on fireball and similar evocation spells? Perhaps 1d8 per level or 1d10 per level.
Fireball is often horrible in pvp.. I once cast an empowered fireball at a pc, and did zero damage. But i have also heard about cases where people totaly devestate other pcs. I think it would be a bit hard to balance.
Evocations don't feel that weak to me but the ability to layer elemental wards makes them pretty pitiful against anyone who isn't disabled.