Eh. It was a chickenshit move by the Saints, though I understand it was the players on the field (and not the NO coaches) who made the decision to run a play rather than taking a knee. I don't think I'd be too happy if an opponent pulled something like that. You wanna just run a regular play? Fine -- it's up to me to stop you and I won't bitch at all if you end up scoring. But if you go into victory formation, you better be taking a knee, not trying to score. The next time New Orleans runs victory at the end of a game, they'd better be on the lookout for the defense crashing the line hard, because the opponent will justifiably point to today's game and say, "We can't be sure New Orleans will actually take a knee in that situation after they pulled that bullshit on Atlanta."
That said, Smith is probably gone and he did a shitty job this season, so my guess is that his frustration probably stemmed at least in part from knowing he's a dead man walking and not just the Saints' shenanigans. And he misused Bijan. (And maybe that's what you were referring to.)