Neither Oblivion nor Skyrim can be fixed with mods. Believe me, I tried.
First of all, it's extremely hard to fix a shitty melee combat system. It's much easier with a ranged system, ala Fallout 3 or New Vegas, because there, just by playing around with numbers, you can achieve a lot (namely, remove Bethesda's patended hitpoint bloat). And ranged systems are so simple conceptually (point gun/bow, shoot) that even Bethesda can't fundamentally mess them up.
But for melee combat, no matter how much you play with numbers (which is what most of these combat mods for Oblivion/Skyrim do), you can't fix the underlying problems of retarded design. For instance, any kind of real melee combat is reactive in nature, one guy does this, another guy does that to counter, and so on. But Oblivion/Skyrim combat is fundamentally non-reactive. You just spam attacks, or spam parry/block, there is no interaction built into it. Nothing mods do can fundamentally change that. You have to basically re-code significant parts of the engine and/or replace significant animations/scripts. Modders in general aren't going to be doing that, it is beyond the scope of modding.
Similarly, how can a mod fix up the mediocre writing in Oblivion/Skyrim? The budget level world design and lore? The pathetic world interaction? The lack of any intelligent gameplay? The quest compass? The endless dungeons that are all carbon copies of each other?
Bethesda is like the McDonalds of open world RPGs. Yeah, they will sell a lot of this crap, but if you want something good, go play Gothic 1/2, Risen 1, Fallout: New Vegas, or Witcher 3.