This has pretty much been my issue with the game. The gameworld itself looks fine, and sometimes it can look quite nice, but there's nothing that breaks it up other than underground caverns. Sure, there are parts that are more grassy, parts that are more wooded, and parts that are more swampy, yet it never really feels visually distinct from one another. This makes me wonder if the typical Souls bleakness was a good fit for an open-world, because it kinda makes the whole setting feel a bit samey, yet it also spreads the atmosphere quite thin. In Dark Souls and especially Bloodborne you could feel the miserable history dripping off of nearly every wall and tree. In Elden Ring you can see the same giant chunk of curved tower wall go by every 10 minutes.
I’ve personally found ER to be FROM’s most visually distinctive and varied yet, so can’t really agree on how it all kinda looks samey. Hell, nearly all of Bloodborne is bluish grey, but its thematic elements make it more forgivable I guess. Overall though ER isn't any different than past games where every main location has its own visual theme. Maybe the other games feel less redundant because everything is tied together more tightly, and there is simply less of every type of area, so in turn there's less room for visual fatigue in a way. However that also makes the world feel less authentic by contrast, because everything is condensed into a smaller conglomerate, so it kinda feels like a theme park in a way.
As impressive as something like Anor Londo was to see, it was really pretty limited as a play space. Mostly hopping around on rooftops while dashing into a castle here and there. Everything around and below it was merely a facade which isn’t the case with ER. In essence its scale feels more legitimately realized.
ER also has the fact that it’s like what, the sixth of basically the same game formula now immediately working against it, even though Bloodborne and Sekiro changed up some of the mechanics. So that can feel a bit draining by now.
I haven't played enough of Forbidden West to see many locations, but speaking again of samey I hope the sequel does more with the underground ruins where you have to lug those power cells around to unlock shit. Or preferably just skips them completely.