I could point out just a few small things.
I think it'd be nice to have the monthly featured article page back. I know voting activity was severely lacking prior to its removal, but I still think it could work in another sense. If wiki activity can't be boosted enough for steady votes, the admins could always just pick a few pages they personally think deserve to be featured and have a discussion over them before choosing one. Going off of that, we could also input a featured image box in the side-bar. It would probably work in a similar manner to the featured article in terms of updating and voting. I know these seem almost miniscule and meaningless, but I think it helps show the wiki is actually active in a means that goes beyond just having evidence of such in the wiki activity section directly under that.
Also, I've always thought that the pictures for the permanent featured articles should be updated, either to match the script font picture for "The Basics" or to atleast have pictures related to RuneScape and not some travel guide and map for the Island of Okinawa.
A news feed could also be nice. Not only for whatever events in role-play would be considered important, but also for the game of RuneScape itself, similar to the front page of the RS WIki. I think that would give role-players just another reason to visit the RSRP wiki and not just head straight to the RS website.
I also really like the idea of the calender you put in! I can't wait to see the finished version of it.