We announce changes as they happen which is the common practice with games everywhere.
A news section in the forums may be an interesting idea, I'll bring it up with Sarah, that's her domain.
As to comments regarding changes to other items - please comment on my announcement post with suggestions to other changes you guys feels are needed. We collect and read all of them and as you can see, we do examine each. When we get a really detailed feedback with interesting ideas we also don't hesitate to implement it and give credit (like we did with Vorkaal).