Since you discussed about the Flow:Extension, I imagine you are using the Flow extension on your wiki.
To us, Flow discussion boards are very powerful. However, they can only be used on the discussion page of a specific page. This doesn't encourage collaboration because users usually visit the pages they watch and some discussions remains unanswered for days...
We believe a special page that gather all the discussions of the wiki will improve collaboration between users.
In the meantime, discussions boards are displayed in a separate tab. This can be confusing to newcomers. If the discussion boards were transcluded under the wiki page itself, it'd look like what users are used to see on other sites (like comments on a blog).
As Mediawiki developers, our team have apply for this Grant to develop such features.
If you think this project should be selected for a Project Grant, please add your name and rationale for endorsing at the bottom of this page : https://meta.wikimedia.org/wiki/Grants:Project/ClemFlip/Wikifab/Various_types_of_transclusions_of_Flow_discussion_boards
Of course, other constructive feedback is welcome.
Thanks a lot for your help.