These strings have obvious problems, and their price has indeed been raised 25% over the last couple years. They're up to $50 per set the last time I looked. For that price, I should get a great set of strings every time. Their price is approaching Thomastik-Infeld Jazz flatwounds' these days (if you're particular where you buy the TIs). As a result, I'm slowly switching my basses strung with flats over to the Rotosound 77 monel flatwounds. They have a very similar tone to them, and though I had a go-round with Rotosound CS over a set of their double-ball-end stainless steel wounds and found them to be wanting, I've never had a problem with their 77 flats. Plus, their price is (currently) a little less than the EB Slinky Cobalt flats.
I believe that, even if we could get EB CS to read these posts, all it might inspire them to do is to discontinue the Slinky Cobalt flats altogether. I don't know that I want that. In spite of their issues (which I hope get worked out), they're still a great-sounding string, and as has already been stated, their customer service is first rate.