Yeah, it's shoddy. The shouts are overall more interesting than what you find in magic.
Come on construction kit...
Even though destruction is somewhat gimped, dual casting is very useful with the Impact perk. You can stall opponents easily with that perk and wait for your shouts to recharge or summon to finish them off. Or just toy with an enemy. Let them get close and about to charge then dual cast and watch as they drop to their knees. It's very useful actually, and that's with the (arguably) weakest magic skill.
It's useful, but it's a gigantic gimmick and even becomes a crutch if you don't level up enchanting to get mana redux for destruction. It just seems really bland compared to the other games especially since they removed spell crafting in hopes to make it more balanced when all they've really done in my eyes is removed options to make interesting spells.