O.o sorry...Little Anakin to me is someone else. Momentary brain burp there. Anyway, the Force isn't required to use a lightsaber for something as simple as what Han does in ESB, but the gyroscopic action requires a tremendoes amount of physical strength and extremely fast reflexes to compensate for in a situation where you have to move the weapon a lot faster and use it for defense or attack. Greivous wasn't Force-sensitive but his reflexes were a lot faster than a human's and he was incredibly strong. (he uses lightsabers in CW cartoon and if I remember right, the RotS novel and Labyrinth of Evil, which I read for One Path) The Jedi and Sith use the Force to enhance their physical abilities in combat even when they aren't jumping or flipping all over the place.

The difference between Luke and Han is trust. Han doesn't trust the Force. He rarely trusts people, and he doesn't trust himself. Luke learned to trust the Force and himself, and generally speaking he was a pretty trusting fellow when it came to others. Jedi calm is largely a matter of discipline anyway.

I think what you're talking about could potentially work but you're going to have a hard time getting Han into any kind of a situation where he's going to accept the Force sensitivity thing, trained or not. Put in a situation where he has to rely on the Force consciously even a little, you're going to have issues. The man can't let go enough to do that. And as soon as anyone tells him, "Hey, Han, you've got Force powers," he's going to be one unhappy camper and probably bolt or something. That's my two cents on it, but it's just my opinion.