I generally turn a blind eye to any "pervy" anime or games from Japan, on account of the fact that I'm not exactly innocent of enjoying them, but like the article says, it does have a very voyeuristic feel to it. The whole thing seems really empty and enclosed simultaneously, as well. Honestly, the preview seemed lifeless and a little uncanny to me, and that actually creeps me out more than the voyeurism.
The problem that I have with voyeurism is that it's generally non-consensual and somewhat predatory. However, it's better if people with fantasies of voyeurism channel them into games like this instead of actually enacting them; no one is hurt or made uncomfortable, since the character in the game is completely fictional. As long as no one hurts anyone or makes them feel uncomfortable, I don't really care what they do in their private time. I'm not really into this sort of thing, but if other people are, then I can't really say anything about it, as long as they don't act like sexual predators in real life.
Also, I found it really fitting, and kind of hilarious, that the game director was wearing an Idolm@ster T-shirt in the video. Not really relevant to the game, just something I thought was funny, considering that Idolm@ster is pretty much about pretty young girls who sing.