It was a mistimed tackle and it was a deserved red card. But at the end of the day Smith was at least attempting to win a tackle in midfield, something which our actual midfielders failed to do all afternoon. Collectively the team let the supporters down today, but it's wrong to single out Smith.
Vince must start the next match, will at least put a challenge in against opponents. The Chapman and Maguire combination just gives opponents too much space.