You didn't even play it or even 40% considering how wrong this is.
I agree with them, and I have *checks* 120 hours of playtime. And counting thanks to Blood and Wine. A lot of that was due to losing my save file, however.
The thing is, a very hefty portion of the game's sidequests are either Treasure Hunt or Witcher Contracts. The former are literally always ''read X, press Witcher Senses key at location, collect loot". The latter are very often ''talk to X, haggle for 30 Crowns more, follow Witcher Sense trail, kill Y, collect reward''. Mechanically, these aren't the greatest.
Now, some of the actual side-quests are more developped, such as High Stakes, and support reactivity, but even so, under the numerous cutscenes and dialogs, most of them have you follow a plotted line, killing X when you gotta kill X and talking to Y when you gotta talk to Y, maybe making a choice in the end that is never referenced again, then collect a reward. Now, of course, there are only so many ways to make quests work in an RPG so I don't fault CDPR for that at all, but let's not pretend they were so incredibly deep and meaningful and important. Most of them were also disconnected from the main quest; why is Geralt bothering to fetch some woman's frying pan when he believes Ciri could be in mortal danger as of right now? Sure, it had some humorous dialog, and tied into Thaler's mission so wasn't a waste of time at all. Yet Inquisition actually explained why the Inquisitor would even bother with such things, even if the quests themselves were often less interesting.
But compared to New Vegas, which often had 2, 3, 4, a few times even as much as 6 ways to solve a side-quest? Some of which unmarked on your map/quest log but that just make sense to pursue? All dependent on your choices and/or character skills and reputation? Yeah, TW3's side-content isn't that amazing. It certainly doesn't raise any bar for me in this regard.
I dunno. Maybe I'm fanboying on Obsidian instead here. But I really feel like, while a great game, TW3 isn't the OMG so exceptional eternal 12/10 masterpiece that everyone must now look up to or be called an ignoramus that hasn't played it, with no middle ground or dissenting opinions allowed.
That said, Blood and Wine IS a pretty amazing value package. The amount of content they packed in there is pretty nuts.