When apps publish stories with action links (e.g. through /feed/me), these links don't appear on the mobile versions of Facebook (iOS app, mobile web). This is a major problem as more and more traffic shifts to mobile and users are losing ability to interact with applications through these means.
I have seen apps try to get around this by using link titles that are formatted like actions. I'm sure that's effective, but since it's a violation of policies, I would like to see this issue solved for developers like us who don't like to violate policies.
I'd like to mention in this context that attribution for apps on the mobile newsfeed is very weak (it appears in a smaller font in light gray) which makes the lack of action links that much more noticeable.