The camera is one of those things that can be fixed pretty late in the game. I wouldn't worry, SE, if anything, is pretty good at polishing their games and they have never given me a reason to worry about the camera or glitches like other publishers *coughEAUbisoftcough*
About them emptiness, not only did they say there would be more monsters, but more "things to do". For example, you can fish near the cabin we saw. I also wouldn't worry too much, as long as there is some form of transportation.
Not being able to play as other members is a downside, yes. I hope the battle system is fun regardless.
As for me...
I like almost everything I've seen, yet at the same time I retain a healthy scepticism. I mean, the game could end up being a chore and having a terrible and boring story, despite the demos looking great. SE has lost its touch with FF, although seeing XIV's success makes me a bit more hopeful that they're taking this seriously.
From what I've seen, the thing that worries me the most is the battle system. Not a big fan of Crisis Core's system. I hope we're not just gonna be mashing buttons.
No troll is too much for me to handle. I rehabilitate trolls, I train people. I am the Troll Whisperer.