Not the person you asked, but for me personally to rate some open world games:

• Hogwarts: 4-5/10. It's pretty damn bad IMO, beyond the fan pandering.
• Avatar Frontiers of Pandora: 5-7/10, it's a slightly worse Far Cry (which is already damn tepid) but looks insanely pretty which makes it a good braindead time waster.
• Cyberpunk 2077: Originally 2/10, laughably underdesigned and so buggy it felt like industry-criticizing sarcasm. Nowadays 7/10 if including the expansion, still quite buggy but not in a bad way, and the redesigned combat and character systems feel artificial but pretty fun. City still too dead and underdesigned, sadly.
• Skyrim: 6-7/10, damn impressive at the time, but only briefly as the game was shallow as all hell, even in its best moments. Still impressive but it's all on the mods and hence the players, not the game designers.
• Witcher 3: 8-9/10, essentially same design flaws as modern CP2077, but given its fantasy world suffers much less from it, of course the empty countryside is, well, empty.
• Subnautica: 10/10, amazing horror vibes, good progression, not too open and not too confined, focus on exploration.
• Outer Wilds: 10/10, completely open and pure exploration, reductive game design done perfectly right.