We don't already have a thread like this, do we? Top 3 changes you'd like firaxis to make to the gameplay. 1: A reason to settle cities on the coast, preferably a trade related reason. The civ 5 split between land traders and sea traders did this just fine. Another possibility is to keep the single trader unit, but give a trade route double yields if both the start city and the end city are coastal. 2: If tourism is gonna be its own yield-type, then it should do something more than just deciding what moment you get a cultural win. It could affect loyalty pressure on foreign cities, perhaps? 3: A limitation on how many trade routes I can send to the same city, to prevent the optimal strategy being to send every single trade route to the biggest and best city available (I know about the tourism boost from trade between different civs, but that just isn't enough). Preferably no more than one trade route to each different city.