I had been looking into something like this a bit before all the changes came, but it never really got off the ground because I couldn't find members that were interested. Though it is sound in idea. Both in theory and practice, the best way to motivate people is to give them a stake in their innovation and give them the freedom to follow their ideas as they see fit. Following this line of thinking, a decentralization of control of bringing content in rather than centralized control will foster more content.
This brings up two further questions; how will people be given a stake in their innovation and how will this be stopped from turning into a bureaucracy and turning BStaff into how it was awhile back.
Both of these are answered in what a content manager would be. In the past, people got caught up in moderating duties - and probably still do. In contrast, a content manager would volunteer to take on a section and given limited power - probably just the power to sticky/unsticky. The job would entail a person furthering their section how they see fit. Other staff members can add content, but content manager would work best as nearly autonomous (the exception being staying within the rules of Battleforums). They would have the power to mold their section, whatever it may be, as to how they best believe it could succeed. What stops this from being the bureaucracy of before is that this position deals solely with content matters and doesn't need to bicker in the matters of forum workings, rules, procedures, etc and content managers wouldn't even need access to BStaff.
This idea could be expanded as to take more advantage of the basic idea behind this as well, but I'll write of that later because there's no point unless the simplified version isn't approved.