I agree that a Control Tower might have helped to prevent this accident. But courteous pilots using proper Unicon procedures can often organize traffic as well as ATC can... so did this GA airport have a mandatory Unicom; published traffic patterns; a normally significant number os airplanes in the pattern?
I retired from flying in 2010 so forgive the questions - things change - but with the fiscal trend, I suspect there are no "bucks" for new controlled GA airports.