I'm perfectly fine with Brazil on release. I'd still prefer Inca but Brazil is so ok I'll accept it.
"It is non significant"
It is 5th most populous country in the world, 7th (once 6th) biggest economy in the world, 5th biggest regarding land area, by far the strongest (and among the best regarding quality of life) country of Latin America, second major country on Western hemisphere after US etc etc...
"It is less important than x empire!"
Brazil had bigger cultural, political and economic influence on the world than following civs: Shoshone, Iroquis, Songhai, Zulu, Polynesia, Sweden, Siam and few others.
I'd actually argue it has comparable impact on the outside world to Precolombian civilisations, Korea and Ethiopia (all those civs are of course much older than Brazil but most of their history was not reaching beyond their narrow area and internal matters). Personally I also think Denmark, Poland, Celts and Venice also were comparable to Brazil regarding achievements and impact.
"What has Brazil ever brought to the world?!"
Check wiki regarding Brazilian culture, literature, architecture, science, and famous people and stop being ignorant. If such minor tribes as Iroquis deserve to be in civ, so does Brazil.
"Brazilian culture is..."
Very diverse, very rich, very unique and very distinctive, also quite popular across the world, as well as representing Latin American culture in civ series (which didn't happen before Brazil appearance).
"Brazil has no great or interesting leaders"
Read Pedro's biography.
"Brazil is eurocentric"
Besides the fact that it isn't in Europe - Brazil is far less 'western' than US. ~60% of Brazil population is of coloured or mixed origin, with huge part of population coming from West Africa, Asia, mestizos etc.
"It is too young and has no history!"
Brazil has history 500 years long if we count from first settlements, 300 if we count actual urbanization instead of feitorias, 200 if we count 'pretty huge independent state being regional powerhouse and impacting the world'. 300 is the best imo.
This means, Brazil 'empire' (big independent Brazil) has history longer than actual Aztec empire, Incan empire, Songhai empire, Shoshone state, Zulu state, Boudicca's tribe
, imperial Carthago (keep in mind I am comparing states in their "big" state, not original cities, tribes, settlers etc), Swedish imperial era, Hunnic state, Majapahit empire (though ofc state history of Indonesia is much older), Ayutthaia empire, to name only civ examples. Brazil has also history comparable in length to US and indepedent Iroquis. Anyway, regardless of how we count its existence, Brazil while one of younger civs is not one of civs/states with shortest lifespan.