Stages are fine and could work well. Our problem with getting things published and accepted is not getting enough input and ideas at the input phase, it is getting them to the committee or group that is writing up the idea in the first place. Once hours of committed work have gone into writing policy or process, tearing it apart and changing every aspect of it at the input level is very discouraging to the ones who have spent time and effort to produce the document. Tweaking or adding considerations that had not been thought of initially is what is expected and welcomed. I am in favor of having members write their changes and present them for consideration at the input phase. Verbal suggestions and vetos at this input stage should be limited.