The problem with what you said here is that the clock had nothing to do with making it a shorter/longer FG attempt. Their defense stopped us. If MM had used the clock "better", as you said, and called an earlier timeout, the Vikings would have gotten the ball back with time on the clock of their own, an opportunity to score, and put our D back on the field.
I probably should have said 'decision management'. Regardless, it's obvious that the opinions of forum members regarding that drive are all over the place. This was a game a lot of gamblers probably jumped all over - most of us felt early on that we were going to win no matter how many mistakes we made or how badly we played. McDonald wasn't taking any chances at the end of the half - that's fine. We still win regardless.
This will sound like a joke, but it isn't: given how many head coaches make decisions that seem very questionable, or flat out dumb, in the last 2-3 minutes before a half ends, it's obviously a stressful period of many games, and decisions often have to be made very quickly. What if you have a person whose only job is to stand by the head coach and check his decisions in the last two minutes? Some coaches, like Sean Payton, excel at the end of halves; others, like Jason Garrett, (and Mike McCarthy?) are/were often miserable. A '2 minute decision checker' standing next to Jason Garrett could have won him a few games. It could even be someone in the booth - they simply call down and say "call a time-out..NOW." or "sideline pass" or "throw to the middle, then spike it." After the coach ignores them a few times, and is proven wrong, as long as it's someone he trusts implicitly, it could start working.