I would like to point out that change in the GD.SE happens because of the way you operate. If you wish there to be guideline for X, Y be allowed and Z be acceptable, then you have to work on it. Complaining or asking others to do so is only so effective. Leading others is very effective.
So for example one thing lot of people complain about is that 3d questions are not being answered. Well, they are not currently being actively closed either*. So what is needed is somebody who consistently answers these questions in a thoughtful and knowledgeable way. Because the community does not cater to these questions they are also implied to be out of topic. By answering these questions it becomes possible to include them into our mainstream.
The same logic applies to a lot of things if questions seem to often be of low quality. Edit them or make a resource that helps users to write better questions. So for example, if you want a guideline for style identification questions, then go ahead and suggest what would be in that guideline.
Everything here works on voluntary basis you cannot force others to do things for you. You can compel them to, so yes opening discussion is first step. But after that first step there needs to be a commitment from somebody. If only you.
So the question is can you do it? We need leaders, and we need more of them. Take charge.
* which in my mind is a better solution