I'd have to give those 4 already mentioned: Espy (Do I have to even write anything?) Doyle (not just the goal... he actually played well. Better when he played out wide and had Espindola to work off of him) Arrieta (2 goals... almost as many as offsides called against him). Dykstra (PK and the save in the 2nd half) Plus Halsti - although it wasn't where he'll eventually get, he was key in dictating the game, especially in the 2nd half.
Arrieta - 2 great goals has to be MOTM Espindola - game changer Halsti - strong midfield play and saved 2 goals - Penalty rebound and off Dysktra's save in the 2nd half.
Espindola Dykstra Boswell (for solid defending, but I'd give it to him just for the hand gestures to the whiny Fire player)
I love seeing different players being considered by different fans, because it means there were several who played well, not just one or two. That's the mark of a good team.