Back to the OP. The reason that there is less family doctors is result of market forces, not Obamacare. Doctors are moving into specialized medicine, not because of the affordable medic care act, but rather because that is where the money (they need to pay back the loans for medical school) and prestige is. This trend has been occurring over the last 30 years.
Want more family doctors in urban and rural area figure out how to lessen the cost of Med School or do what the military does (in exchange for paying for medical school, you serve for 5 years in rural area)