I have seen Doom Eternal on PC and played it on PS4. The fact they got that on Switch is insane. Is it an open world? No, but it has so much on-screen at the same time with fast kinetic combat. The one downside is I think Switch is the only system it's 30FPS. Witcher 3 open-world is never loaded in all at once with culling and other tricks. Bigger flat areas with less on-screen at once and less action generally than combat in Doom. I would also throw Dragon Quest XI in there even tho it's less of a port and more of a custom-built version.