I am unsure how we could make them good. The limited liability and non-corporealness means that you can never hold the corporation liable.

Bring back the corporate death penalty and actually enforce it. Have a three strikes law for corporate crime; after three criminal cases the corporation gets dissolved, all of the assets are seized and the executives are thrown in prison. Other foreseeable improvements: give corporate charters an expiration date. After a quarter century they need to file a new charter if they want to continue business with the add legal privileges. This will bring more scrutiny to the entire process. Don't give them indemnity for any of their products especially when they make fraudulent claims about them. Don't give them eminent domain power; overturn Kelo v City of New London. Abolish evergreening; let patents expire when they do without secondary application bullshit. Patents shouldn't last more than a decade much less multiple decades as they do now.