You're clearly missing something.
it seems to be what L4D should have been... there's nothing really new or amazing about it. simply better graphics, new guns and a few more enemies.
Best game this year.
I'm also not overly keen on daylight sections, as picking out special infected from a crowed becomes far too easy.
It's the same a Left For Dead 1 or am i missing something .....
It could have been an addon pack tbh. Its not that different.