Absolutely there are gaps as educators we do have academic freedom to exercise.
Many ways of improving feedback to students:
1. Make sure your feedback is credible
2. It is on target to what exactly you are referring to with regards to a specific point in the question.
3. Feedback must be clear, constructive, helpful, legible and interpretable
4. Feedback must be timely. More importantly have I given my students enough time to practice and integrate feedback provided.