I posted what Ice Storm was actually doing back on
page 3.
In short it was gaining 1 damage to Ice and 1 damage to Bludgeon per caster level. Wall of Fire gets 1 damage per caster level so Ice Storm was getting twice the scaling.
So why not give it the same scaling as Wall of Fire because fixed damage spells (Incendiary Cloud, Acid Fog etc) are a joke.
ie 1 Ice damage per TWO caster levels
+ 1 Bludgeon damage per TWO caster levels
That gives it the exact same 1 per caster level as Wall of Fire.
If you are going to spend time and effort on this spell, then change it once and make it useful then spend the rest of your "spell development time" on fixing the rest rather than having a second and third pass and making Ice Storm work.
All the current fixed damage (persistent) spells are bad, we ALL know that so please lets not bother with spending time on making a new unscaling persistent AoE spell. Surely it's plainly obvious that any spell that doesn't scale is either overpowered at low levels or useless at high levels.
I'm sure Ice Storm will be awesome at level 7 (or 8 for Sorcs) when we get it, but we don't stay 7 forever and end up at 20. Since we don't get anything new at high levels it has to scale to remain useful.