Finally played the demo, about to start the first real mission I think. The voice thing is a little more jarring than I thought it would be, but all the voices are pretty amateurish (the general guy in the trailer is so bad it's almost funny), so I'm going to go with the local "talent" explanation.
I actually really liked the voice acting. It was absolutely terrible, but in a way that gives it a sort of classic 'action heroes' vibe which fits really well with the game's theme.
I'd like to believe it was trying for a cheesy action movie vibe, but it was so wooden and phoned-in that I couldn't be sure if it was intentionally bad or just plain bad. I'd honestly prefer they all just shut the Hell up, because the cutscenes are so cut and dried they're not even worth watching.
The gameplay I don't really have a problem with. It's not X-COM as I remember it no, but it does feel reasonably solid. It's kinda like a flash-game pastiche of X-COM, all of the strategy and tactics with virtually none of the detail. Which is alright, because it trades detail for speed and X-COM battles could take a long damn time to play. And it is self-reinforcing when you get into it. I understand that the demo is hard-coded to Easy Mode or something but the AI still isn't stupid, and you can definitely lose guys if you don't take it seriously.
All in all, I'm not disappointed with pre-ordering it, because frankly I've spent as much on far worse games, and this one is at least trying.