The suggestions forum is kind of a trial for the voting thing, and if people like it we may consider adding voting to things like setting submissions or art threads so the most popular ones rise up like the suggestions so. The suggestions forum is kind of a way for staff to see what's popular on SARP and prioritize what we're working on using that as as a guide.
That said, the Setting Discussion forum is for discussions and questions about the setting so it's best served by being a discussion forum (typical forum layout) or perhaps we could add Q&A topics (people post questions and the answers can be voted on, like StackExchange).
Use of the suggestions forum is not limited to technical stuff. It's for anything anyone wants to suggest ideas to the staff, whether that's updating an old article that's out of date, or asking us to add a wiki article about beer. May the best ideas rise to the top.