I'm thinking about their ability. First, they have the highest coastal start possibility in the game. This would obviously be critical. They can also buy out city states and get 2xs number of trade routes. I'm really considering that could be far more absurd than Babylon or Korea for science as Venice could grow so quickly with the tradition path and cargo ships, as city-states have a coastal start bias as well. Could it be possible to have Venice as a size 100 city by turn say 210? And launch the rockets by turn 215? I haven't played them before because they seemed too boring for only one city, but this could be killer here. Has anyone tried this before?
No, there's a many things holding Venice back compared to those civs.
1. Science isn't 100% capital centric. A good mountain expansion will provide easily 15% of your bpt even with no food help.
2. Going all out on food to the capital requires as many puppets as you have routes. Each puppet increasing science costs. A probable better approach is to use some of them for gold or feeding puppets.
3. Getting these puppets is more complicated than just producing settlers. You either need a merchant or conquer them. Conquering would require a lot of hammers going into an army and besides the optic merchant, you can't really afford to generate merchants rather than scientists if you wish to compete in a SV race. A lot of the science in a SV comes from GS.
4. This brings us to 4. where venice unable to control puppets specialists will generate a few less GS due to having less cities (due to the counter always going back to 0). Or worth, start generating merchants and engineers.
5. All these 4 points are why Venice is probably worth at science than a civ like Danemark with no bonus toward SV. Then you add the real SV bonus like babylon, korea, maya or Poland. These civ do not trade off the ability to make cities to get their insane bonuses.
6. . You cannot build multiple wonders at once. While this is a below deity things, being able to make 2 wonders in 2 cities is a big advantage towards having normal cities.
No, I know it sounds good and fun but Venice just cannot compete in a straight race. Being able to make strong additional cities at 15% or 20% of the total output, generating GP points, just straight beat getting more trade routes.