Civ7 is definitely still a Civ game, and the tweaks to core Civ mechanics - things like removing builders, adding army commanders, towns and cities, adding influence to diplomacy, these are all amazing additions! Antiquity is pretty much Civ7 before the controversial features kick in, and I'd argue it's the best the franchise has ever been. At its core 7 doesn't shake things up quite as much as people say.
The issues with eras are probably fixable with customization options and more ways to score legacy paths.. It's civ switching which I doubt is salvageable for a large chunk of people, since a lot of the negativity is down to the emotional response it produces and questions of what Civs you identify with while playing. I don't see a good way to fix that.
Civ VII is at best a poor imitation of previous version, and will go the same way as beyond Earth.
On a personal note I have to laugh out loud at "down to emotional" response . Maybe take a step back from , and look at the real and many reason's that this "version" has flopped.
This "Civ" is at it's core a switch game and many off it's trade off's reflect this .