I don't see anything wrong, in principle, in having basic 'model' laws that apply to most people in most states/localities. A good 'for instance' is our right to concealed carry. -- It should apply nation wide.
The problem is that the ONLY model laws are produced by the ABA's organizations. There is no conservative or other alternative model code which the legislators may use.
ALL legislators have the new model divorce code with homosexual unions and children as accessories and provisions for homosexual sex partner standing in heterosexual divorces. They have no competition.
The ABA need competiton. The NRA should generate model laws for CCW.