Let's not pretend that Yokuslu didn't used to drop into the back line a lot last season. As Adder says, the difference is Kipré's ability to carry the ball out Vs the current incumbents.
When Yokuslu would drop deep between the centre-halves, the full backs would push on into midfield to overload the opposition. Heggem was ok, but Furlong was anonymous, and that meant there was no threat from out wide with the wingers nullified.