So far, the only difference is that districts need tiles to be built on. And they also receive bonuses for adjacent tiles. That's all. They still look like improvements separated from city and I still need most of the districts to be built in each city as it was in Civ 5. Sometimes I may want just focus on production or gold but that was a thing in Civ 5 too (trading posts or mines spamming). So, what is difference if the most efficient way to win is building campuses everywhere and become tech leader? I'm just getting bored of the fact that campus gives me drastical bonus to science so that I feel like it must-have in each city. Same about Industrial zone - you certainly need it everywhere or cities will not produce anything. The only exciting thing about this is that many wonders have requirements for terrain/district adjacency. That still keeps system somewhat exciting. But in Civ 6 wonders are not necesarry to have if you want survive. In Civ 5 they were much more important - I had at least one or two during my game. It is just my current point of view, it may change with time, but I came to it after my third civ game when I felt like I should do the same things over and over, like in previous games.