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Pretty much. Just like most of the girls in the show. It's pretty much expected of a harem. Well, usually.
But I think people harp on SuguXKazu for different reasons than AsuXKazu. Specifically, While I do think that the romance between Asuna and Kirito is bland, plain, and far too dynamic-less to be realistic, that's because their characters are the same way.
With SuguXKazu, I heard it best described as something along the lines of "The Relationship That Never Was". Because there are only really hints and...that's it. Hints from Sugu. But there's not really any buildup or...anything. It's more like something that's happening, and you see it, but you already know how it ends and...that's pretty much it. Kinda like a side attraction that's running alongside the main show. One that, when it ends, you think "Oh, did that happen? Huh."
In the end, I'd say neither of them are particularly compelling relationships. Asuna's relationship is just two perfect for something that had no buildup, especially considering that (since the creator doesn't plan things out and just writes, so we can omit the later SAO-based LNs) it just kind of happens, and with Sugu it's pretty much the same way, except you're given less reason to care. Unless breasts are an important reason to you, in which case the opposite is true for Sugu.
And I mean this all sincerely. Trust me, I'm the last person who'll aggressively bash something or blatantly give cynical opinions.
