Leyrann
Deity
I've changed mine to 0 with the reveal of 30 civs on launch. I've been skeptical but hopeful with the ages, but there's now no way for the game to launch with any kind of continuity across ages that satisfies me.
What's more, I do cynically think this is a conscious decision to remove content from the game that they can resell to us easier later. Massive red flag and hard pass from me as a result. I'm more than happy to stick more hours into the older games and wish everyone well with this new one if it's for you.
I don't think there's content removed from the game though.
Civilizations only last through part of the game, which you can argue removes content from them, but they also have significantly more unique bonuses than before, plus all of them have unique artwork, and altogether I'd say it's hard to justify even the argument that one civilization in Civ VII is less content than one civilization in Civ VI. Let alone that 30 civilizations in Civ VII is less content than 18 civilizations in Civ VI.
Obviously, the Civ VII setup also requires more content to work, and 30 civs is probably the absolute minimum you can justify - but that's no different from 18 being the absolute minimum you could justify for Civ VI, imo.