At my first job there was an expression... You have to shoot the engineers to finish the code. Everyone thinks they have a great feature to add, it'll only take 5 minutes. Even PMs and Business Owners think the same. Reality is, if it isn't a critical requirement... leave it alone! Come back if there is time (rarely). Otherwise, it is a billable item in phase 2. We do want to make money, right? It'll only take 5 [minutes|hours|etc]... and 4 months later it is part of the QA process, still causing bugs that delay the release, and everyone forgets it was not even a critical part of the system.