It seems to me that DS3's intented audience, and by extension the gameplay, were very clear. Combat-focused, gamepad-focused, not too much distraction in the shape of dialogues or secondary gameplay, a strong combat system. And the audience were the gamers who liked console ARPGs like the Dark Alliance series or some recent X-Men games.
I don't think DS IP is as strong as either one of those, so not enough to carry a game by itself, and not being a real RPG there's not much interest from RPG players either. On the other hand, if the game only cost $5 million or so, a few hundred thousand sales would probably make a profit, so it may be OK.