I think it's quite unfair calling Seohyun just an idol, she's proved herself as a top force in the acting world time and time again now. As far as the other guy, I don't know much about him acting wise so I won't comment but I just think it would be fair to recognise Seohyun as an actress now.
Oh no, please not Song Hyekyo again. She was so bad in Now We're Breaking Up, like it was like pulling teeth prompting her to make some sort of emotion.