Too little gained for too big a speaker,
I agree with this criticism. Aesthetically, the 8361 on their own are nicer to look at.
For a properly treated studio such a sub will be beneficial, but not in a living room.
I disagree with this one. As mentioned, it's not a sub(still 2.0), but rather a tower module extension. It's more like choosing between the bookshelf 8361A vs tower 8361T than it is between the 8361 vs 8361 + sub. Also, I think a less treated room(like a living room) is where the W371 really shines, as those rooms typically have more(and worse) bass issues from 80-300Hz, which is what the W371 fixes.
I'd add another criticism of the W371, which is the price. Where I am, the 8361 is $10,000/pair, while the 8361w/W371 is $28,000/pair. No doubt the tower version is the better 2.0 setup, but is it really that much better? From what I've seen tower models are often 2x the price of the bookshelf in the same series. This is almost 3 times the price.
Having seen this review, if one is looking for a SOTA full range 2.0 setup, the 8361A is among the best values that exist.