Theres one flaw (at least I think it is a flaw, mabe others have a different play style): When I found a city late in the game because I want the resources and the terrain isn't that good otherwise I dont want the city grow quickly. It increases unhappiness and doesn't add much of value.
Trading post spam it and get some gold out of it EVen if that doesnt stop it to your hearts content use the stop growth button.