Doesn't change my opinion any, but my opinion doesn't matter. The relevant question is, does it change the opinion of those who would be hiring him?
I suspect it probably doesn't, and probably shouldn't. He's been given the remainder of the 2015 season to audition for the job going forward, so he's got four more games at least in which to do that. To me, given the circumstances, it would be incredibly reactionary to base a momentous decision like a head coaching hire based upon 19 excruciating seconds at the end of a football game. That last 19 seconds looked about like a Chinese fire-drill, I mean it was really tough to watch, but then I think about the fact that Claeys had been the acting head coach for all of three days at that point, so a little bit of disorganization amongst the coaches might have been expected. That doesn't make it any easier or the blown clock management any less egregious, but for me it makes it at least somewhat understandable, as I believe probably everyone both in and around the program is still operating in a state of shock.
So he buggered up the end of this one, well, for the vast majority of the game his team was playing some really inspired football. They took it right to Michigan, thoroughly outplayed them, and really should have won the game. If Claeys can manage to coax that kind of effort out of his team in the coming games, then hey, we just might have a head football coach here.
Having never been a head coach before with the exception of the 7 games in which he was simply a stand-in, he might very well be liable to making some mistakes, but what's important is, will he learn from those, and will he grow into the role of head coach? I don't know, but he's got the rest of this season to prove so. I'm fine with that. No way would I mentally throw him out on the basis of one game, especially at a time so emotionally trying as this.