Norway league has also just completed and it consist of 14 team league (small size). The following overall result was observed;

Home Adv Chart (N3/N1): -5.5/-10.5
Form Chart (N3/N1): 0.5/-18

The chart pick up a slight -ve consistent swing in HA, and observed a N1 -ve swing for Form Chart (similar to characteristic of big league).

I have observed that Europe tends to follow N1 -ve Form Chart swing for small scale leagues (10-15) whereas rest of the world (USA/China) give N1 +ve Form Chart. A good point that should take note for future upkeep.