I'm currently making my own wiki for a project at uni, at let me tell you, it is a right pain in the arse lol. It takes more work than you would think, so I can sympathise with those involved with this undertaking.
I'm wondering what the focus of this 'new Ck wiki' would be; purely gameplay, bit of historical background, or a accumulation of everything associated with CK. Remember, if you want to future proof it, you should set up a format that can be easily adapted by a CKII game. With any luck, a simple but intuitive wiki could help to involve less hardcore gamers into the world of paradox games, especially considering that lack of proper explanation is somewhat of a given throughout paradox's historical series of games.