Hey,
I've recently been working on the Campaigns edit page with Yuvi. Its currently a textarea where you have to enter JSON to edit the event's attributes. We tried to convert it into a form (of sorts) to get the same data. I first made a wireframe - https://www.mediawiki.org/wiki/File:Wm-campaigns-edit.png - and then applied the Agora style to it - https://www.mediawiki.org/wiki/File:Wm-campaigns-edit-agora.png. I wasn't able to spend as much time with Agora and thus most margins and sizes might be off, but it gives an idea.
Ideas and feedback are welcome - https://www.mediawiki.org/wiki/User:Prtksxna/Wikimedia_Campaigns_Edit
Regards, Prateek