So what you're saying is, you didn't like L4D or L4D2. That's entirely your prerogative ... but it's ONE game type. Valve are obviously working on others, and there's no reason to assume they won't be like the other stuff you previously felt "worthy".
It's sort of like complaining that a car...
I'm confused. Valve do not charge for map packs, whether they be community or Valve-made. They never have, and whether they were included with other updates has little bearing. I see no logical path for your reasoning.
I believe not in this one, but the new Lego Indiana Jones 2 will have that ability.
I played the original Lego Star Wars games individually: great fun.