Portugal -- good.
New map type -- I could take it or leave it, but that is fine.
Two new wonders -- good.
Zombie mode -- will likely never use.
What is disappointing is that after the first two modes and the backlash about the historical realism of those modes, were told the other modes would be more historially realistic. I really don't think that ever fully happened, and frankly, Zombies is a step way back. I don't understand nor want to understand Zombie culture, so it is what it is.
Two big misses on the game-modes that if this is end of life for Civ VI development, were big misses.
1. Ideologies -- similar to BNW on Civ V -- the formation of blocs and pacts
2. Revolutions -- almost got there with dramatic ages, but instead of forming non-aligned free cities, actually forming new civilizations.
Both were major influences in the later part of historical development -- it would have been great inclusion.
Now if there is a new season pack -- maybe there can be focus on more historically based content instead of these "gimmicky" game.