What you’ve just said is incredibly false. Everyone is not going to agree on the same thing. That’s how opinions work. If everyone agrees on the same thing, it would be a fact that that thing is better. Also, the devs are not required to listen to anyone. They balance what they think needs to be balanced accordingly. The only things we do is give feedback on their changes or give them ideas that they can adapt on. So far the most popular solution for Mercy is the one suggested by Titanium in his, Why I Have Yet to Not Despise Mercy's Current State post.