I’m midway through my first game of Civilization VII, having recently started the Exploration Age, the second of the game’s three eras. Thoughts so far:

1a. This is a breath of fresh air for the series. It feels new and original, far more than Civ VI did. The gameplay has been engaging turn-to-turn, whether building up my military to defend against hostile independent cities (incidentally, I think this is the first Civ game where barbarians/independents have been challenging by default — at times this felt more like fighting the stroppy minor factions in Shadow Empire or the tribes and barbarians in Old World), waging war later on, or focusing on internal development.
1b. The design feels pared back, but in a good, elegant way. Each turn moves at a brisk pace. Playing it side-to-side with Old World is an interesting experience. Even in the early game, Old World feels much grander: it has a bigger and more-zoomed out map (even playing Civ VII on a “large” map versus Old World on a “medium” map), more distance between settlements and factions, and more moving parts.

2a. It feels rough or unfinished. Others have pointed to examples such as auto-explore only just being patched into the game. For me, the giveaway is non-functional, vestigial bits of the interface — there is a “form alliance” button on the screen for independent cities that does nothing.
2b. Other parts of the interface still seem inadequate — by clicking the down arrow I can find an itemised list of everything that increases city happiness, but just where can I find the corresponding list for deductions? Similarly, when examining or changing social policies (“+1 influence on science buildings”), it would be good to know what exactly the effect would be.

3. I’m glad I bought Civ VII — so far I enjoy it a lot. But I’m also very glad that I waited for a discount (more than 50% off a boxed PC code, before shipping), because I would be much, much less forgiving had I paid full price for this at launch.