there are rising costs for settlers, districts and builders, so it's not so easy to found many cities. And although the costs can be mitigated, the new growth mechanics would ensure that cities without fresh water don't grow fast. Wide play in its traditional sense means founding cities without being choosy, but now it the places to settle are primarily dictated by the avalability of fresh water spots and are therefore map-dependent. So yes, you can found many cities, but will they be able to grow big? Also, barabarians seem more aggressive now and will keep your expansion in check in the early game. But time will tell what the playstyles in the new game will be.