The problem with this discussion, is that there's a big old subtext here that's not really about this specific chain of events, and that's what's really feeding the debate. Time management is something Garrett has historically not been good at, and then we didn't handle this end-of-game opportunity well, and it became a bigger issue than it really needs to be. The back going out of bounds and giving up a clock-stoppage was a mental error on behalf of a veteran player. DMC has not really been prone to a lot of mistakes, and I don't really believe he'd have made this one if he didn't think he could likely get to the first down marker. He got tempted, and he went for it and ended up stopping the clock. From that point on, we're kind of arguing shades of gray.
Personally, I didn't like that sequence. I think we should have netted the first down, milked the TOs and the clock, and then played for the touch or kicked the game winner on 4th down. But playing the way we did wasn't completely insane, either. WAS isn't going for a 2 point conversion in a tie game at home in that situation, so you've got a tie in the bag and a very likely win if you just play decent ST and decent defense.
We, of course, did neither on that series. As a fan, it was all-too-predictable. As a coach, I'm taking those probabilities, every time. Even if I don't like how I got myself in that situation.