You're missing the point. This is not a paper on image acquisition, it is a paper on image processing. Because they began from scratch, they used very favorable image conditions. They are not pushing the idea that their capture format is representative of an application.

We have no idea how hard it would be to recover an image using 50-5% of the light. No one has written that paper. Same for resolution. The paper does not claim to address that question so it seems silly to critique it for not doing so.