How are you not understanding this? Wielding a one-hander two-handed is not as good as using a two-hander in terms of damage, defense, or reach. It's already balanced. As for the link, I can't be bothered to. If you use Google (a skill beyond the ken of the OP, clearly) then you can find it yourself.
I get what your saying. I defy anyone to argue that a dagger used with two hands is as effective as it is one handed.
Two-handers -> DESIGNED to be used two handed, hence a two handed weapon will be better than a one hander.
That being said, one-handers used two-handedly should incur penalties. None of this "split the middle" carp.