It's...not awful it's pretty powerful. Like anything if you're sold on dual-wielding GET PERKS FOR IT. That's the idea, yes if you try to do it without those of course you're not going to be great at it. What's your big issue you can't block? Well you're dual-wielding you've decided for an aggressive combat style not good at avoiding damage. You keep your distance and dodge around the enemy. If you're going to a dual-wielding dervish of death you need to be on your feet, you can't sit back and soak the damage obviously that's not the fighting style.
I'm not complaining about the viability of dual wielding, I'm complaining about the mechanics and actual execution of attacks. Dual wielding feels sloppier and more awkward than trying to swing two baseball bats with your hands manacled to your legs. It doesn't really matter how powerful it is. If viability were the only concern then the in-game console and a few cheats would take care of the problem. However the console cannot fix Bethesda's lack of foresight and common sense.
I really hope HeX decides to remake his UVII mod once the CS is released, because he is by far better qualified for this kind of thing.
Think about what a mod is. It's using an already made system to concentrate on ONE ASPECT. Those large mods usually take years; granted there's only a person or several working on them but they're focused on a single goal using a pre-made system to guide them through it. The dev team has to break fresh ground and make everything in the game. World design, physics, quests, NPCs, dungeons, items, getting the sound to work, designing weapons, spells, armor..etc etc etc. Do you see the difference?
I don't think you quite understand the Unnecessary Violence mod. The author did not have the advantage of using an "already made system", in fact it was quite the opposite. The Oblivion engine
did not allow for dual wielding. The author did not have to start from the ground up; he had to do something worse, in that he had to work around a system that was trying to make his work impossible.
Also, you do realize that "the dev team" is not just one team of people that creates the entire game right? They have completely different sections of the game being designed by completely different teams. So it's not like 10 people are creating the entire game from the ground up. World design, physics, quests, sound, these are all made by completely separate teams, so there is no excuse for whoever designed the mechanics to have dropped the ball so far.