It should be fine. Vic is correct that a standard map you could easily fit in 6-8 cities. Not all of those cities would have luxuries and such, but that is besides the point; there was enough room to get a solid 6-8 cities.
If Civ 6 is ~20% larger, that should ease up the greater demand on tile improvement mechanics.
As for what "ideal number" is good, I don't much care. All I care about is that it is always beneficial enough to settle cities so the map gets filled up. Having huge swaths of land go unsettled was never much fun.
If Civ 6 is ~20% larger, that should ease up the greater demand on tile improvement mechanics.
As for what "ideal number" is good, I don't much care. All I care about is that it is always beneficial enough to settle cities so the map gets filled up. Having huge swaths of land go unsettled was never much fun.