Umm, I agreed that it is more sensitive to low numbers.
It is.
If the entire arena had 9 people in it, one more person logging in would represent 10% of the population. If it was evenly split at 3-3-3 before that person joined, his country would now have a 33% population advantage over the other two countries.
If the entire arena population was 99 then the next person joining would only represent 1% of the population. If, again, there was an even split at 33-33-33, then the person joining would give his country a 3% edge in population over the other two countries.
I just quoted you to jump in and illustrate.