Tonight was his first night where the rocks truly outweighed the diamonds. For 8 weeks or so, I'd be okay with that.
For the rest of 2023, I think you cannot leave him out. He is your best option there by a country mile in attack there. Quite frankly, you need him there to help score points. If he continues to churn out errors, replace him at the end of the season.
Fullbacks sometimes just need time and the Knights should give him the season.
The good thing about Miller is his attitude. He does have James Maloney-like short memory where he doesn't let his errors affect his approach to a game. The day that changes and he is affected by his errors is the day to drop him.