The thing it, plenty of teams play good football but still have players that can score a header. Southampton are the best example. Their strikers Lambert and Do Prado are massive and wouldn't look out of place in a big ugly side but they have them playing in a proper footballing team and get balls in from good positions. They don't play long ball but they football with big strikers. It seems the best way to me. But as you say, with Koren there is a very limited number of ways to play.