I wouldn't say he is lighting up the league but I also wouldn't say 18 goals in 22 appearances is him being in crisis. Still our best goalscorer by a country mile and we'd really be struggling for top 4 without him.
We'd also be top if he took the easy chances against Chelsea, Everton, Middlesborough.
I love him, but just go watch some extended highlights of an old game and you'll see he's miles away from the player he was.