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

• Hogwarts: 4/10-5/10. It’s pretty damn bad IMO, beyond the fan pandering.
• Avatar Frontiers of Pandora: 5/10-7/10, 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.
• Witcher 3: 8/10-9/10, 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.