I am a professional graphic designer. Presenting with obvious defects to fix before shipping is not common practice. In any serious design engagement, the client would probably just be confused about why something changed after approval and it would lead to an unnecessary meeting. On top of that, I'd probably end up having to revert to the shittier version they agreed on and waste time re-packaging the deliverable. Purposefully using up contractually allocated revisions with deliberate flaws, while very difficult to prove, is essentially fraud. If the graphic designers you patronize do that, get new ones.