Currently, Rules & Gameplay is a mix of:
-Homebrew/WIPs (new warbands, campaign settings, etc).
-The occasional tactics guide/"how do I counter X?"
-FAQs/inquiries, especially about wonky rules ("How exactly does a Magic Carpet Work?")
Warbands are already a sticky, and FAQs/"common workarounds to unanswered rules" could probably be as well.
Having Homebrew as its own board would be nice, especially if it had a sticky for projects that gain their own traction (Ex. A Mutiny in Marienburg update sticky, etc).