Often your boss/team mates seems just to know everything better despite having expertise in a specific discipline. What polite metaphor/periphrasis would you choose that states clearly and shortly thier solution for a problem is oversimplified and out of their scope without offending them in the team e.g. on a discussion?
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It is a rhetoric issue depending much on the situation and how close you are with a person. It is always a little bit offending especially in a team at work because people may take it personally. Using "Schlaumeier" or "Schlauberger" may be less aggressive. At work it may be a better approach to address this issue objectively.