Most of the drivers I spoke with loved the format. Their reasoning is/was that for the most part the outcome of the race was determined by the 10th lap. Also, the start is always the most exciting part of the race and everyone (ok most everyone) had three starts that day.
However I'm not sure how that format would work if the fields were larger or there were more groups. Also the SM/ITB/ITC had three laps under full course yellow. Spending 30% of the race under yellow really isnt that much fun.