I agree, Lee Si Kang will change the character not only from this image but also behaviour, specially glance of eyes, his face is massive comparing with Jin Woo's ... Yes, it was Jin Woo's decision to leave the show but he was really suitable to the character. Why? With his youthful appearance he could act KY's internal tear, inside drama... just a weak person who was a toy in someone's game. Si Kang can't follow this idea...and we have a new...drama! But the last voice belongs to the director. Uhm,... I will stop watching because of Jin Woo... Watching once again, as you said, for me , it is a lost of time.