I'm not saying to fire him, I'm saying that McD needs to address the problem as he sees fit. And it's a bad look to not tell the truth (at the very least to his team) when you are preaching process.
We as fans aren't owed anything. Same goes for the media. But in order to put this behind them, the team needs to know exactly what the mixup was, whose fault it was, and how it's being addressed by the head coach. I think it's a bad move to just let it hang around and chaulk it up to something vague like "we didnt execute". They need closure in order to bounce back from that kind of a coaching screw up.