I'm playing Sweden on Immortal trying to get a Culture Victory. I find that I'm actually bending over backwards to be diplomatic with everyone to maintain that 25% open borders bonus and to not have them DoW on me (so I can keep my diplomat, open borders, and trade routes). Also because I'm Sweden, I want as many friends as possible to maximize my UA, of course. I realized that between my trade routes, diplomats, Open Borders, and generally trying to be as nice of a guy as possible, this feels FAR FAR more like a Diplo Victory than the actual Diplo Victory does. I'm actually agreeing to all the civs' gift requests/demands, whereas I almost never do that with any other victory types. I'm trying hard to make friends and to not piss anyone off in fear of losing my tourism modifiers. It's so much more diplomatically satisfying to actually be diplomatically interacting with civs rather than city-states to attain a victory. I'd love if the actual Diplomatic victory involved this aspect.