But there was this great mod made called Deadly Reflex that upped all damage given and received by two and a half times.
So with a big sword and a power attack you can one hit certain enemies. But you also were in danger of dying quickly to a powerful enemy.
Also you could not survive 10 arrows sticking out of you but died after being hit by a couple. This mod is awesome.
I could not finish Oblivion on PS3 because the combat was a stupid spam of slashes. Skyrim NEEDS a slider or option to increase damage done that applies to players and enemies attacks alike.