Just read another article about it. Turns out that you will get to play as many different types of soldiers, from infantry to special forces.
And yes, they also said they will be doing a lot for emotions.
The thing is, even though games like MW2 also try to play on your emotions, it can never really quite get there because you are playing in a very fictional setting, while in MoH, it's basically a non-fictional story, because the campaign is based on the lives of real people.
Needless to say, I'm looking forward to this one, but the similarity to Bad Company 2 is a bit of a turn-off.