Have you ever had to stand against every body and insist on doing things better?
You may have been confronted to such a situation without actually following through, thinking it's not your role, your concern. What happened next? Nothing changes and things keep getting worse.
But doing it with a justification is never something you'll regret. If your product is not ready for release, there's no regret in spending that extra effort on it. If your team is not performing well enough, things have to be said.
The worse would be to be too compliant despite clear reasons not to be or too severe without any such reasons. If you believe it, speak up.