I agree with 90% of your post, but I don't believe giving judges even more power is the answer. The problem with that is every judge will do it differently depending on what color shirt you have on or what he/she ate for breakfast. Instead I think there should be a "guideline" and there should be calculated adjustments to those depending on certain factors. Nothing is perfect, but I completely agree that the required child support amounts right now are driving dads to live in a cheap apartment and work 3 jobs, which leaves no time for family. Things need to change and dad should be considered in the equation just as much as mom.
Just FYI, both mom and dad's incomes are included in the calculation of child support. But, I challenge you to demonstrate which income has the most impact. Mom can make $5,000 or $50,000 and it will usually make about 10% difference in support. If dad's income increases from $5,000 to $50,000 support may increase by about 5x.