Hi, just wanted to give you a heads up that I'm the new Wiki Manager for this wiki, taking over from Thatawesomecat. At some point in the near-ish future, I'd be interested in doing a bit of work on the main page, probably just expanding the welcome section and maybe making a few stylistic changes, and adding some links to the local navigation, if that's alright with you. Let me know if you need anything and I'll be happy to help out. :)
Certainly, any sort of time-dependent content like that on the main page should be updated as much as possible. Since Valkyria is a popular series, a news item at least every couple of months would be feasible. The way that news posts get onto the main page is by categorizing user blogs under Category:News; an excerpt is then transcluded there.
I can't personally focus much time on writing content (my focus is more on the technical side), but I completely agree with the idea. On Elder Scrolls we have a news team for this purpose. I don't think this wiki is large enough for a whole team, but if you were interested in putting up a news blog here and there, I think that would be great.