If this is played correctly you could see FG gaining as they will and should position themselves as the "we did everything we could and FF ran away." Snakey Martin was at his odious best yesterday.
Realistically FF couldn't win anymore seats as a result... but then again we figured that at the last election in Feb that they couldn't do as well as they did.
If another GE is called the trickiest part will be how will Martin and Kenny play out still being leaders of their respective parties. Their positions almost certainly become untenable but how would that shift?