[psychoslave]

Well, the engineer first move should be "do we really need this dynamic to achieve the global goal, or can we do without"?

Most of the time however stakeholders will prefer that someone unleash the last technical shiny tech stack (that no one master in the team and that is about to be dethroned by the even newest thing) to deliver a pixel perfect reproduction of the mock-up rather than question the relevance of the proposal.