I wouldn't use the term "no one" but I guess you could say this game is discussed very little compared to others.
There are a few reasons for this. One; the DS titles are seen as inferior to some, this mostly goes for all handheld titles, a lot of us shouldn't really think this was but we just do. They tend to be smaller games overall and a more compact experience, whereas the home console installments are usually the giant anticipated releases.
Two: the game is see as one of the lesser games in the series, now I'm not speaking for myself, I really liked this game but I see why people think this. The stylus controls were fiddly at times and it just seemed slightly odd, as if we had less precision when controlling Link. Then you have the perspective which I guess could be seen as controversially? People tend to associate top down with the past and even this wasn't full on top down, but it still played like one. However, the main advantage of the top down games, is the challenge and puzzles they bring, Phantom Hourglass lacked in this department in my opinion. Then final bad point about the actual game, would be the overworld. The Realm of the Ocean King, wasn't as expansive and as open as the Great Sea, plus it was rather linear - just split up into four different sections. So I guess a strong argument against could be the lack of exploration.
My final point would be about the game placement itself. Now say what you want about The Wind Waker, it is still a very good game. I feel the idea of the story and the overall tale it presented, was amazing. Now the ending was the perfect way to cap off that epic adventure, you have Link and Tetra sailing off for a new Hyrule. It was like that sense of "did they find it?" etcetera. A bitter sweet ending in a way. Now this game was a direct sequel but yet it wasn't. Now of course it was a sequel but it wasn't a sequel a lot hoped for. There is no "new" Hyrule and the tale ends up to a be an insignificant one, which didn't feature the kind if continuity you would expect. So I would say that this kind of ruined that special ending of The Wind Waker and gave a bad outlook on that entire Timeline.