Can you play as any faction in the beta?

Starting tomorrow, you'll be able to play as any faction; right now, it's only Necropolis.

I got the chance to play the beta. My personal opinion: finally, a game that I can put on par with the third installment. I really liked everything. And considering that this is just a beta, it's even better.
I'll say this right away. The changes in the gameplay are ambiguous, and it's unlikely that everyone will be satisfied. But I'm more than happy. The game has really become more mature and serious.
But, as they say, it's just my opinion, and you can't argue about tastes.