Well, after sleeping on it, if Saboteur 2 was announced, I'd pick it up. I forgot about the actual story missions. After doing all freeplay maps as I bought them, I got back into the story, and it's fun again!
Don't take yourself so seriously. No one else does.
With the fate of Pandemic, it seems unlikely there will be a sequel. This game barely even made it to the stores, which is why it's unpolished.
I would definitely buy a sequel or a spin off.
There are so many ways it could happen, Shaun could easily join the British and attack the Nazi's else where in Europe. Or they could spin it off and give a new character in some other place but along the same lines.