At that time there was NO enforcement of child support. None. It wasn't a crime punishable through any means. If you went to the courts the most they could do was send a letter reminding the person that they should be paying child support. The first support enforcement law we were aware of (working from faulty memory of childhood here) was in CA around 1985, but it didn't grandfather.
So when it comes to lessening the enforcement portion I'm mostly against you. Child support payment has to be enforced, there needs to be reasonable limitations, some sort of rollover period for unemployment (ala student loans, not applicable if you quit, doesn't cancel the debt just defers it, that kind of thing). They should definitely take a page from the IRS, deadbeats can't pay their child support from jail, garnishment is better than imprisonment.
Of course the guideline structure from the fed has got to go, not only is it not their jurisdiction but it punishes the wealthy. But to me these guidelines are only 1/3 of the issue, and not the important 1/3.