I know and I got a bunch more suggestions, but this seems like a rather easy thing to do for them, no?
to set up a secured, private ms is a lot more complex than adding a few lines of code to the templates and have some links on the side ... it doesn't have to do anything, there's nothing behind it, just some links
they should be able to do this in a matter of days and comparing the little bit of effort with the significant difference it will make for the users ... massive ROI guaranteed
There is the question of determining what links to show though. There are some 'easy' options, but pretty much any implementation is going to draw criticism from different groups about fairness. There is also the difficult task of determining relevancy and choosing posts the reader would want to see. Doing this feature 'right' is actually not so easy.
I do think it should be done though, and am in support of the idea. I know they are hard at work to improve Steemit and add new features, so I suspect it is only a matter of time.