After choosing my culture in the first era, the game force me to change my outpost to a city while I have another one that will be done in the next turn that is far more interesting. Unfortunately, the game force me to turn the outpost into the city otherwise I can't go to the next turn. That was not in the previous preview and it is clearly a drawback. During the first start of the game, we can create an outpost and find another spot later that is better during the era change and this prevent to use this better location.

Workaround: Don't select your culture until you are ready to build your first city.

Titanclume wrote:
Yes I could have done that. Selecting a culture reserves it and it is quite important so I still hope they will allow us to create our first city at the moment we decide. 

This is (I think), designed to be a tough choice.  If you could have it both ways, you wouldn't need to decide between advancing (to reserve your culture) or staying (to get the best capital location).