This might be a massive ask, and likely unfair to pose to the devs even on a hypothetical level; but, what if they DID do all of this as an alternative mode of terrain generation, rather than a complete scrapping of the noise map generation? A choice made at world/server creation that allows you to choose between the infinite, but less geographically interesting and detailed worldgen, versus the limited, but geographically interesting and detailed worldgen which makes these features possible?
Doing so may also result in a rise of small or whitelisted communities, specifically made and designed for a more cohesive world where the logic of settlement and travel matters more than the jumbled steppes and pseudo-valleys of noisegen terrain (though I'm completely oblivious to what "landforms" refer to, with the assumption that it's like semi-premade shapes for the land to generate into). I think that would be a good, healthy change for the game, and create a new draw for more players looking for something more than Modded Minecraft+1.
This would also make more roleplay-immersive environments possible, which is something I very much care about, being a very narrative-driven roleplay-centric sort of player myself. I love the idea of being in a community that strives to form actual, "functional" villages and towns, and play out the marching of progress as people roughing an unforgiving world rather than as players interacting with gameplay elements, if that makes any sense. This kind of thing would go great with mods that cater to that idea, as well, like the Natural Trails mod, and other things that would incentivize and ease setting up common roads between locations to facilitate trade.
Granted, if this route is gone down, it would be nice if the rivers were somehow able to facilitate travel by boat, at least in the case of larger rivers: right now, I feel heavily discouraged to use them, as most living either happens inland or on the shore; and I've never been terribly into coastal living in games like this, which feels increasingly necessary in Vintage Story, especially if you aren't lucky enough to find a nice, big lake.