Thanks for the quick replies.
Just about any bitmap painting app now exports layered psd's, from a five pound sketchbook pro on ipad to the full blown PS CS6 at 1500 pounds. So even poor amateur game creators would benefit from this feature.
As for having to apply features for different graphics apps, that doesn't really makes sense, as the importer shouldn't make any distinction where the psd came from.
But you are right about construct2 is maybe not conceived from the ground up to make storybook apps. That's not the impression I got from some of the other threads on the forum, saying that the engine was more than capable of doing so.
I would be happy for construct to flatten all layers to seperate png's and maybe do some cropping on import, nothing that hasn't been suggested on the forums already, as far as I can make out.
Thanks again for your answers,