Idk since I am hardly into PMs.
Feeds' improvement has nothing to do with the so called PMs coz Not All users have epics to share all the time via PMs.
Besides, the scope of interaction to know opinions on wide range of subjects can only be reached properly through a forum based question or thoughtfully expressed post where there's nothing to impress a wide range of audience n one's responses are their own feelers to a great deal.
Also, all the users can read others' interests to know them more and better.
Having typed it all, I understand your point of view abt those participations that limit upto PMs only.
Well, you can't stop users from doing what they want.
