Civilization could've been made to be portable to consoles and other media while retaining 90% of its intended gameplay. It's not. The costs I presume would be minor compared to profits, and thus enable more polish and investment into DLCs etc.
So it's a PC game. Presumably that would mean they'd want to capture as big a PC audience as possible, from Celeron 1024x768 Intel HD4000 laptop owners to i7 GeForce GTX1080 owners (I'm exaggerating obviously). That's not happening either. I've seen footage taken (presumably) in Firaxis HQ, guessing on a reference gaming machine. AI turns are sluggish in mid early game already.
It's an exploration-expansion-builder-combat-singleplayer-multiplayer game. Six focuses for one game. Hard to do. Each should be polished to the bone and then interwoven with the other 5. Not seeing that either. (Consider that this is a brand new game, not an expansion).
Dips in overall player activity while at peace are still huge. Watch the first 40 seconds of Quill18's 4th video. Tell me, how many seconds of these 40 is player activity. And how would you characterize the player activity that you see? Fun, interesting, exciting, meaningful, boring, kill me now? (spoiler alert: it takes 27 seconds @ turn 70 for the AI to complete its turn).
https://www.youtube.com/watch?v=qO58UkNeAzc