I definitely agree about roleplay — I mentioned our (off-site) roleplay community in my draft for a new welcome dispatch. If you have any thoughts about revising that, please do share!
As for the wiki, I’m not sure it’s something necessarily worth promoting as a ‘standalone’ thing. I’m not as active on the wiki nowadays but I personally got into writing articles because I first got into roleplay; without something to write articles about, I’m not sure new players would be all that interested in the wiki. I certainly do hope that we can get more new players interested in roleplay (or gameplay) and if they then want to write articles, they can use the wiki.