Like I said in my original post they are much better off not trying to follow game's story and instead tell the story from perspective of citizen in Rapture, before it's destruction and see madness taking over the Rapture through their eyes.
Reality is there is no way in hell a movie format can effectively tell main story of Bioshock because it was design around us playing the game.
It's just a world, and some characters. It will obviously not be the same experience, yes Bioshock is a great game because of the interplay of interactivity & narrative. But it's a great world, it's got a lot worth exploring... it might be hard to do, but it's absolutely possible to adapt this into a really good movie. It happens to books all the time -- you can't do with a film what you can do on the page, in the same way you can't/wouldn't do with a game what you would do on the screen.
Perspective of citizens in Rapture as things fall apart is a great angle for some scenes, perhaps some kind of intro or a series of flashbacks or whatever... but I'd be shocked if they didn't just stick with the main character in the game.
Never. Then again that goes for any adaptation. It will never compare to the original material.
What do you mean? There are a ton of really good adaptations of really good material to a different medium. Even video game adaptations... or I suppose, stories which are heavily, heavily inspired by gaming and an overall gaming aesthetic. When the right people who "get it" are involved, interesting/entertaining/"good" movies are made. That's all it takes.
Now... I do admit, for whatever reason, that it can be slim pickings with regard to
official adaptations -- at a minimum I think there are "worth the watch" movies based on Mortal Kombat, Silent Hill, Pikachu, Sonic, maybe one or two of the Resident Evil movies... I'd even argue for Warcraft and Assassin's Creed, personally. And there have also been a number of pretty close calls which held promise -- Blomkamp's Halo, Gears of War, Verbinski's Bioshock, John Woo's Metroid!... there's probably a few more.
Then consider movies that seem to be really clearly inspired by video games or directly about video games -- Wreck It Ralph movies, Jumanji movies, Crank movies, Hardcore Henry, Upgrade, Scott Pilgrim, Tron movies, Edge of Tomorrow...
It's not a VAST list of "great" offerings... but I think it's trending in the right direction, generally.