Every D1 grade has a minimum of 1 club providing 2 teams
Winter 2013 will extend this further , most D1 Junior grades will have 2 clubs providing 2 sides.
Of Gings list , I think Nomads cannot be counted on to provide anymore than 2 D1 sides. Which means we are reliant on both Selwyn and Waimak having a true D1 side in every grade. Potentially Parklands could provide 1 or 2 teams as well.
So if 8 team grade is the preferred option clearly we have the big clubs needing to provide 2 teams. I expect Chch Metro to be down to 5 clubs in the next 3 years. It's implausible to run a club without driving it from the juniors.