Actually what would really help is if someone would make an ACTUAL wiki, or at least FINISH the shit wiki that already exists.
I think nobody will stop you from making a wiki ... . This days everyone can make a wiki. But very few others than you would like to do this, when everyone is expecting the new version, where most likely a lot of Information will become no longer correct.
This was one of the Problems the old wiki had. If you have a wiki and nobody updates it, it is worse than having no wiki at all.
The current wiki is about developing the game and i am pretty sure that it will stay this way. I am thankfull for all the work the devs and tester put into this overhaul and i don't think that anybody will have an issue with you starting a wiki for the old or the new content. If you want a official answer if they have a problem with you starting one ask them. It could be nessesary to adress Shilo here personally so he gets a information so he reads here, but i see no problem at all with this.