Your lightsaber theory is cool, but ummm… wrong. Luke lost the lightsaber Obi Wan gave him when his hand got cut off by Vader in e5. Vader even gives Luke an attaboy in e6 for making a new one before they meet the emperor.

And Anakin DID bring balance to the force… “from a certain point of view.”

Nifty thinking, but just bantha fodder here. Move along.