TSL Earth maps reveal some of the inherent problems with Civ VI. No tall play? No Tech transfer between players? No exploration if borders are closed? No Specialist slots? No space for Districts, Wonders or Improvements? No colonies, vassalage or outposts? No Iron or Niter nearby? No Farms for Loyalty? Enjoy expanding from Europe or Mesopotamia.
TSL is a measure that partially corresponds to representation of historic-cultural diversity, the relative lack of which becoming obvious on Earth maps (especially when theming a pre-colonial leader pool). I'd guess
@aieeegrunt is referring to balance. The non-Eurasian Civs are so few, their birth lands so vast and open, that they automatically sit at the top of the score board if included.
Move Phoenicia TSL to Carthage (or add Morocco, Ashanti, Songhai, etc.). Currently, Mali owns all of North-West Africa.
Maori should start in sight of New Zealand. Still, without Australia selected, and with no Hawaii or Aborigine to choose, all of Australasia/Oceania is Maori, or empty.
Add at least 1 native American Civ (using mods if necessary). Without post-colonial Civs in play, the Cree get all of North America.
Give India and China an additional leader each with a Capital further South (or better yet, add Tibet, Timurids, etc. to improve dynamics in Asia (or closer match Europe)).
If the option is there, lower Loyalty effects, or else Europe will be stuck in Dark Ages and become a continent comprised only of Free Cities.