Hold on here. You realize you can have two spells at the same time right? It doesn't matter if you can't cast them at the same time.
Right hand, cast summon Skeleton.
1second later
Left hand, cast invisibility.
OR.
Right hand, cast ice bolt at that charging warrior to slow him down
Then
Left hand, cast lightning to damage that mages magicka.
Oh no! I'm being surrounded by a group of bandits.
Holds right hand attack to cast flamethrower creating a circle of fire around me
Left hand casts invisibility
Fire dies down, I sneak away. The bandits are seriously confused.
Skyrim's magic is going to be awesome.
Hell, there are limitless possibilities!
the only difference is that now you can't really combine them. I think I even read that you can cast them at the same time, only that the effects don't combine.
So basically, casting fire and ice is still possible.
but what I imagine is:
freeze the floor so that bandits bail on it, then freeze him down so he can't get up. then, I'd shock the hell out of him so that he can't silence me, and it would eventually kill him
I definitely prefer combos to just one big ass spell. makes me look more stylish. and if something makes me more stylish, then let it be! (why do you think I love DMC lol)