It isn't knew. Coaches and analyst have been using turnovers has an important stat for years. Additionally, "explosive" plays are regularly brought up during telecast. If you recall that was on of the things we wanted to limit last year and this year. Creating a composite of the two stats is a logical way of looking at what teams have done.
There is no magical state (quantitative or composite) that will make predictions more accurate. Individual match-ups, coaches & p player preparedness, and injuries will always "trump" shortcuts.
This is something the gamblers would love to use, but ultimately get burn on,... look out suckers, here comes Vegas,..LOL