[James Blint]

I had a look at the historic results for the last series and it seems that of the 8 weekly series that were available, 4 of the series championships were won with only 5 races completed,  3 more weekly series would have had multiple champs if one race was dropped.
Now why is this already happening?  I think its due to lack of participation in the latter weeks.  

In my experience, some racers are easily discouraged after 2 or 3 races (im talking about single event series) so people don't show up anymore when they don't think they have a chance anymore to win the champ, or at least sometimes they just think so, since anyone can have a bad race or two in single events. Sometimes you might just loose interest in racing a series.

There's also the reverse effect i think, like people with very agressive behaviors showing up for the last races of a series when they have no points and can cause havok between those who had actually competed during the whole championship.