It seems like there would have been a really unfair home field advantage for Kolhii games on Mata Nui. Ta-Koro and Po-Koro are scorchingly hot and Ko and Ga players are likely to get heat exhaustion. Frostbite and hypothermia threaten to overwhelm both players and audience in the Ko-Koro stadium. No one but the locals can even see the Kolhii ball on the poorly lit Onu-Koro fields.
Vertigo and acrophobia plague those in the Le-Koro stadium, and it was not unheard of for Nui-Rama to swoop down and carry the occasional player off before the hive was destroyed.
Ga-Koro is generally accepted as being the least difficult field of play, but cheap stadium seats are often flooded by high tide.