Nice, I don't know what the trade route nerf is since I just picked up Civ 6 about a month ago. What was it?
I just managed a T235 with Rome on Immortal which Im happy with! I only built one IZ and that was in my cap, Im feeling like multiple IZ's wont be a benefit to a low turn science victory... I just dont need the production. All other cities just had two districts comm/science and then around t160 I set myself up for the endgame by buying most research labs, sticking all trade routes to rome to make it big enough to work every mine/lumbermill and running campus city projects. Projects feel amazing for grabbing the clutch scientists like Carl Sagan to shave a good 10 or so turns off a victory. I only had 9 cities so I was generating 400 science with projects running, my cap had 150 production which isn't the best but was good enough. Im thinking if I want to make this any quicker Im going to simply need more cities (and of course, micromanage far better than I am), but not sure how many more I can squeeze in before switching my domestic routes to growing my cap.