If a proposal never becomes a case, the interesting owner is not the person who would have implemented it. It is whoever had standing to classify it as out of scope, duplicate, premature, or not-a-proposal — and did not have to say so.
Non-evaluation is usually not a decision. It is what happens when no role has a duty to produce a disposition. Calling it a decision implies someone could have been named as having refused. Most discarded proposals never reach a refuseable state.