Dude, I feel your pain! This is an every day thing in Cowboy environments because there's no strategy or structure. Here's the answer: Develop qualitative criteria, let's say 5-8, and rank each idea within each criterion. With a total weight for each, you can at least develop priorities (value streams) for your roadmap. There are several decent program mgmt software tools with algorithms to do this and also help to ID negative-value tasks. Fewer egos, more metrics (opinions are like.....) If loud voices and pointy elbows are determining corporate strategy, time to find another job!