Mock interviews or presentations are an opportunity to refine your own judgment of how to approach the real thing well. Too often, they’re viewed as a place to receive feedback you never thought of.
If you have a good mock interviewer or audience, the likelihood you will get good feedback is high. But, that isn’t the point as it is only useful in the short run.
The way to approach practice of any sort is to use your coach’s (in this case, your mock interviewer’s or audience’s) feedback to train your own judgment on when things are done well. This means that the onus is on you to look at your performance critically before the session and walk in with a hypothesis on what needs to get better. All these hypotheses then get tested and validated, or not.
Practice with a coach is both great and important. But, you’re going to need to develop the discipline to coach yourself over time. Besides, game time is an exercise in solitude and listening to your own gut.
It is best to be prepared for that.