Simple. Classes can't be changed during Blitz matches, only Crossfire matches. Is this to be corrected?
I believe it is so in order to force you to learn/be good at the class you have chosen. OR so that you cannot switch between classes based on the bots being presented. Example: "Zomg jackbots!" (everyone changes to assassins) However, it is murderously annoying when you begin a public blitz match and two of the three other people choose the same class as you. (excluding support). I would suggest allowing players to change their class every 10 rounds during the annoying "And now a word from our sponsor." *half of screen is taken up with you bot kill count*