Creating a stronger fireball would be sweet, the boom sound and explosive area damage would be better if it did more then 50 damage.
I think they removed it because to be able to combine spells wouls be hard to get the right sound and visual effect. When creating a fire spell, how would we be able to pick between the effects of flame, fireball, incinerate and wall of flames? Add a different spell to that and what effect.would we get?
In obvlivion all destruction spells had 1 effect and combining them would always result in the lightning effect with the added damage of fire and frost
So they painted themselves in a bit of a corner, so what? All they need to do is make a few more effects and prohibit certain combos that don't make sense and combining destruction spells becomes manageable.
Something like this:
Novice spells:
Electric can combine with either fire or frost, but fire and frost can't mix.
Effects needed:
1-Fire and Sparks
2-Ice Spray and Sparks
Higher level projectiles:
You can't add a fireball with an ice spike [two solids, opposite effects] or any frost effect to any solid fire spell. Electric can be added to fire/ice projectiles. Fire effect
can be added to ice projectile.
Effects needed:
3-Electric Fire Projectile
4-Electric Ice Projectile
5-Fiery Ice Projectile
Higher level:
6-Electric Fire Storm
7-Electric Blizzard
8-Wall of Electric Frost
9-Wall of Electric Flames
10-Electric Frost Cloak
11-Electric Flame cloak
Basic rules/logical explanation:
1-Electric is the purest form of Magic and can overlay any other form of destruction spell.
2-Fire and Ice don't mix. [Except for flaming Ice Projectiles]
That is not a lot of visual effect combinations to have to cover and would make spellmaking viable, permitting for the adjustment of the intensity, duration and area of all spell effects and for the combining of different destruction spell effects.