I'm loving Civ 6 so far. While it's almost impossible to judge a 4x game without putting in like 300 hours, I'm enjoying the whole 'fumble around figuring things out' stage far more than I usually do with Civ games. There's a lot more to think about with district placement, adjacency bonuses, culture trees and their eureka system than I'm used to. In most civ games I can get away with basically building everything everywhere, here I'm forced to specialise cities pretty heavily and actually think about their development. Location is far more important, but it seems to start you off somewhere pretty decent for your first city. Mountains provide great bonuses to holy sites and campuses which is awesome because they're no longer just these awful blockers.
Wonders taking up a tile and removing all yield from it is great too, makes it worth postponing for a while and/or buying otherwise crap tiles. Wonders also require specific locations (eg riverside and next to a city, next to stone resources but not an a hill, hilly desert etc) AND provide adjacency bonuses to certain districts, so I've ended up doing stuff like building Stonehenge over my farm (thus destroying it) and then replacing a sphinx with a farm so i can still get all the adjacency bonuses. It makes things far more dynamic.
The AI seems a tad smarter too. Not genius by any means, but still an improvement. Barbarians scout out your city and only approach with decent odds, otherwise hanging around to try and snipe civilians. Two civs that were quite friendly towards each other just declared a joint war against me using a casus belli for reduced warmonger penalties, and moved against me together. I switched to military focused policies and pumped out a shitload of new units, causing one to sue for peace before we even clashed and the other to retreat and build up their own forces in turn. That's either an awful lot of coincidences, or AI civs actually plan and adapt.
Sending a delegation to another civ (which they can refuse) allows you to get a base level of info about what they're doing (crushing barb camps, working on wonders etc) which helps make the world feel more active. Civ leaders also get traits, one seems to be fixed and other is random and hidden. So the Brazilians in my current game get pissy if I'm pumping out more great people than them but love that I have high tech and culture, he Spanish would prefer I adopt their religion (and will get mad if I spread mine to their lands) and also get annoyed if I explore more than they do, the Scythians will hate me if I betray any friends, whereas the Sumerians are just flat out hostile UNLESS they really like you and will do almost anything for a friend (including going to war with me if I fight or even denounce them). It really does feel as though each leader has their own personality and I'm walking a thin line between pleasing them and pissing them off.
While I'm sure there must be things missing from Civ V, I haven't noticed any yet. It seems to include all previous features (or improvements on them) while still adding a load of new stuff. My only (minor) gripes at this point are that religious units can get a bit spammy if you end up in close proximity to multiple civs focused on them and that I'd havve preferred a more realistic graphical style.
So yeah, you could say I dig it so far.
4. I discovered another continent on the same continent as my own. I don't understand. Apparently Africa and Siberia share the same landmass?
I mean, that's not without precedent. Look at Europe and Asia.
7. Civs don't seem to be racing for wonders like they used to before.
That's likely because of the terrain requirements for them now. I've researched wonders that I flat out can't build due to not having desert or a coastal city.