I already sort of just did what you suggested. I ended up using a script called Demo Palette.jsx which among other things, allows you to scale an entire comp up. So, I applied this script to all 5 of my comps (my actual project was a bit more complex than the scenario I described to you – but I wanted to just give you the basic problem).
Then I had to go back in and reset some of the scale properties on some of the layers to 100% (the script sized them up to 222%). It actually did not take that much time, but it still seems to me that the cont. rasterize button is problematic.
I would be curious to know from Adobe as to why a nested comp with a 3D camera, loses all of its properties when Cont. Rasterize is turned on.
Anyway, consider this case closed. Thanks again for your input.