Maps in quicksearch

I came back to the game, used to play a lot during 2010-2011, mostly quicksearch and after 100 games Ive noticed the original maps rarely appear (texas, saguenay) or have never appeared (great lakes, new england, carolina, hispaniola) I assume they changed the map pool for quicksearch games but they’re not evenly distribuyed, why was this changed establised?

I miss some of the classic in ranked (Great Lakes, Bayou), but I bet that they aren’t balanced enough. Would be cool a smaller pool but with automatic rotation.

Thanks for your answer,
were some of those maps too convenient for certain civs?