Following the merge and deployment of https://gerrit.wikimedia.org/r/252366, there's some cleanup work to be done.
The Meta-Wiki wiki portal pages are still being manually updated (example: https://meta.wikimedia.org/w/index.php?title=Www.wikinews.org_template&diff=15638972&oldid=15636429), but these wiki pages are now just decoys. We should probably unprotect the Meta-Wiki pages and mark them as deprecated/historical. This may require some other work to automate the updates without using Scribunto/Lua. We should also update https://meta.wikimedia.org/wiki/Project_portals to reflect reality.
Looking at the wikimedia/portals Git repository as it is today, it looks like only www.wikipedia.org is using Handlebars templates? That should be addressed.
Finally, some of the footer text needs improvement.
It may make sense to create separate tasks for these action items.