I looks like our opinions aren‘t actually that different. But I actually think 2k/FXS has the resources and long term planning to get against the momentum with time. Like paradox games, I view civ as long term projects, and not 1-year titles. I don‘t like 2k but I trust them that they invest many years in civ 7. if they don‘t I think civ as a franchise and FXS might as well close down.
Imperator is an interesting case. To me, it was weak at launch, and turned into a good but not great game over time. The reason why I don‘t play it anymore isn‘t mechanics - these are good, maybe the best currently in strategy games. The problem is it‘s emptiness and sameness, and that‘s due to the setting. There are many „players“ that could be fleshed out with more content. But 50% of the map and 90% of the „players“ are unlikely to ever get detailed content. Compare that to EU and CK, where almost everybody has something unique going. In Imperator, it doesn‘t matter at all if you play Gaul tribe A, or B, Iberian tribe C, British tribe D. All play the same: no content and start as an OPM in the midst of other OPMs. I think this is a long-term problem of Imperator that can‘t really be solved.
You may have the same stance on civ 7: ages will be a long term problem that will never be solved. But I would disagree there