Thank you for the response.
Good to know that one can still access it - as long as one knows that (and where) it exists in the first place. Maybe it is just me, but I sense a misconception here - your concept of the feed appears to assume that customers already know exactly whose new products they want to see, even if they are completely new to shapeways.
The "global feed" in its previous form did so much more to promote designs - it would showcase models from designers one did not know before, and also highlight older models as long as someone happened upon them and liked them enough to add them to their favorites. And last not least it provided a form of popularity barometer.
If I only want to follow a walled garden of four or five designers, I might as well just bookmark their shop pages and revisit them directly. (And then I would never come across designs that do not interest me personally, but which I might still forward to a friend with matching taste or interest.)
And as already mentioned by MrNibbles, the follower linkbacks are just another avenue for spammers.
At least with the Lists I have the choice to keep them private, why should this "follower" thing be different ? Or do you want to inflate your user count by privacy-conscious designers creating pseudonymous accounts for their "private" endeavours - it might be awkward to show whom one sees as the close competition one has to keep an eye on, whom one secretly gets inspiration from, or just that one has a personal interest in kinky statuettes, unusual body gear/body modifications or anything else that goes against one's shop image.
Perhaps we are just different demographics, but I have a growing suspicion that shapeways is overrating what goes for "social" media aspects these days while the technical functionality is dropping from focus, and once-useful tools fall into disrepair and are quietly removed.
Much of what you call "untangling of yarn" looks awfully like a new and/or reduced crew cutting away working code that they are no longer able to understand and maintain.