You could do it as clear polycarbonate, but good luck working on it with your average model tools.
Not to mention it'd be significantly more expensive.
True, depending on the materials used in the mold, the number of complex pins on the inner surface and any other ribbing, this would be problematic for polycarbonate. Plus you have to account for pellet dryers in the manufacturing process (to reduce the moisture content, thus eliminating some of the issues you've mentioned above). It's not impossible, after all the upper hull is basically a gigantic potato chip bowl - but it would make for a very pricey option.Also, it probably wouldn't work.
We did work with polycarb. And the molds have to be specially designed to run the stuff.
It shrinks like the dickens when it cools. And if there is not enough draft on the part, and the cycle times aren't set right, the parts seize right into the mold cavities.
And depending on the shape of the part, and the mold cavity design it may require a trip to the tool shop to remove the part.