Lila said about a month ago this on her talk page on meta about the development of Flow:
- As you know I am holding back planned roll-out of this feature pending internal review. What I am seeing above is that many requirements requested are satisfied by it at the expense of losing features some of you consider critical. I am asking for a full list of use cases that are to be/not covered and clear roadmap of those and will invite you to review. -- LilaTretikov (WMF) (talk) 18:32, 5 November 2014 (UTC)
I fail to see any new green hooks on the other side here lately. Do I get it right, that development has stalled until this is straightened?