Some rules I believe would be useful:
1. Lawyers should not make laws, it's a conflict of interest as lawyers don't make money arguing simple easily understood laws.
2. Legislators should never (not be allowed to) vote on a law he/she hasn't fully read.
3. All laws should have an expiration date, if it's still useful then it's worth going through the full process to reinstate it.
Last but not least. The statement "Ignorance of the law is no excuse" was and is only useful for a set of laws it's reasonable to expect the average (AVERAGE CITIZEN not lawyer) citizen to know and understand. I don't believe our current existing legislation is even in the same universe with that concept.