Mid-spell targeting switch

Why can't you switch targets mid-spell? It stinks having an enemy die on you and not being able to switch targets, thus you lose that spell for a rotation and the energy with it....

Um, be careful when you cast?

Not always practical...some spells take ages to cast...not my fault over-zealous teammates destroy the guy I am targeting.

If only it was that simple.... the casting wouldn't be an issue but Meteor Storm for example uses 25 energy to use... and if my target is killed the spell fails and so goes my 25 mana!

Not to mention u are hit with the neg. effect from casting it as well...