The only complaint I have about the demo is the outdoor parts of the levels. As someone said already, F.E.A.R. simply does not work in an outdoor setting. The reason the original F.E.A.R. got you so tense and worked-up was because you were constantly in enclosed areas (hallways, office rooms, what-have-you) with nowhere to go if the shit hit the fan. Being outside made the game drop way more into a simple run-and-gun approach. And, while that works for other FPS games, it simply does not fit the overall feel they seem to be trying to emulate in F.E.A.R..
To be honest, though, it's blatantly obvious the only reason they included such things (the outdoor levels, the EPA, and so forth) is to satisfy the cravings of the multiplayer console users. No insult meant to the console users in the crowd, but it's true: the original F.E.A.R. was developed solely for the PC and PC gamers, and was developed with story, atmosphere and setting as the focal points. The multiplayer was fun, but it was not the main selling point for the game. But now that Monolith is trying to tap into the money-well that console gaming is these days, they seem to be fine with giving up some creativity and dedication to atmosphere on the hope that more powerful weaponry, more open levels and so forth will draw more of an audience. Of course, they're almost alienating their PC gamer demographic, but if it means more money, that's okay, I suppose. (This point is further proved by the lackluster controls, such as the absence of the lean control, but that's already been mentioned.)
I am definitely going to get this game, because I loved the original and, despite what I said, I still enjoyed the demo. Having said that, though: Fuck you, Monolith, for turning your back on your original fanbase from the PC.
(Cue the "PC Fanboy" comments.)