Yeah I don't like that you can't choose what kind of meal you want to conjure with Delicious spell.
What I do now is I cook meals and just use the duplicate spell to make more.
I agree, I wish they designed Inferno, Chilio and Zip-zap, the sad part is they had better options to chose from and they didn't do it.
They could have recycled the "Summon Meteor" from Island Living, edit it, to be the Animation for the Infernate spell.
In seasons There the rare chance if you get struck by lightning, x amount of times during a thunderstorm, the sim becomes temporarily empowered by electricity, and can "Summon Lighting" to strike the ground. I feel like they should have recycled that for the Zip-Zap spell. Spell caster would be able to empower themselves with electricity at will and Strike other Sims and objects with lightning. It's the same effect but a grander display of power.
As for chillio I guess recycling the Freeze ray animation from Get to Work is fine... maybe if we could freeze more than just sims, like if we cast chilio on a puddle, it would create black ice, on the ground create snow. Conjuring a snow ball and throwing it.