Have just started another runthrough of this after completing it on release. Am finding it a bit boring to be honest. Using a fireball in the left hand and a straight sword in the right. Not sure how to become more engaged. Wonder if this is just post-Dark Souls blues?
Well if you're playing Skyrim for deep combat, you're doing it wrong.
Besides, you should Dragon Shout your way to victory.
If you're on PC, you might look at various mods that make combat different, more difficult or other stuff.
I will note that Spellsword style is rather boring, IMO, in Skyrim due to one's inability to cast spells while attacking (or at very least, they slow down attacking) and make aiming clunky along other issues like spell and weapon switching a pain the ass.
I miss that cast spell button from Oblivion so very much. Made Spellsword-style really viable.