I've been polishing the editing interface. New screenshot:
Fast but finicky or slower but more reliable
Of course, this is only for the Kiki page class. Other page classes will need to specify their own interfaces (using a combination of 'textfield', 'boolfield', 'metafield', and 'choicefield' skeleton nodes), but the only other page class I have right now (Kategory) doesn't have much useful to edit.
Still working...