We’ve found decision logs and our structured “RFC” process quite useful at Notion. The extra structure from a dedicated SaaS for this could be helpful. But to me the Pro/Con voting system seems like it’ll work only for Go/NoGo binary choices. What about selecting the best option from a suite of candidates?

Do you have any details on your decision log? I'm curious what details you add to it. I guess it'd have fields like date, decision made, options considered, and who approved the decision.