Remember the World Cup is in 2018 as well and is possibly the last one he'll experience so doubt he'd want to become an impact player again as it would mean he wouldn't go to the WC.Hasn't he stalled a bit at Leverkusen? He might have come to the realisation that he's best employed as an impact player. Who knows what's going on in his mind but as I said he'd have to accept that role. I think he might given the experience he's had.