My experience with Hahnemuehle papers over the years is they have some of the worst quality control, but they've always been good at replacing rolls. I've had numerous rolls with winding tension problems that result in dinged edges, flecks in the coating, like you mention, squashed bugs in roll paper, bad coating on the Photo Rag Satin that rendered the paper unusable, coatings that flake easily, etc.
Having stocked up on the old Harman paper, I haven't needed the Hahnemuehle branded version, and I can only hope it doesn't become infected by association.
But, like I said, they have never failed to respond favorably when I complain. Just wish that step wasn't necessary.