Iwobi wasn't brilliant but he wasn't bad and he's incredibly inexperienced. He did something you barely ever see Walcott do, get the ball, drive at goal and actually score. 99% of the time Walcott would get that ball, run 5 yards, realise he'd have to go shoulder to shoulder with someone and turn away then pass back. The 1 in 1000000 when he's run at goal he'd have a 99% chance of getting that either caught under his feet and fall over or take a embarrassingly heavy touch and let someone nab it off him.
Iwobi is showing good signs, though once again you have to wonder why Sanchez in consistently awful form gets another game, Iwobi gets a game but Campbell was nowhere to be seen. Left to rot on the bench again, I hope Wenger goes and another manager gives him real game time, if Wenger stays Campbell/his agent should do everything they can to get a move away, being utterly wasted by Arsenal.
Lanzini goal was fantastic, West Ham have an excellent shot(boosted if they win today but not hurt if they lose) to get in the top four this year. City are poor, have Kompany out again, a terrible record against the top half and a very top half heavy run in. I don't think Arsenal will have too much trouble as we have a bottom half heavy run in and a strong record against most of those teams.
EDIT:- the commentators were an absolute joke, saying something like, for Arsenal to win the title they have to win maybe 7 of 9 games left to make up a 11 point gap. If Arsenal are to win the title they basically need to win 9 out of 9. Leicester got 23 points in their last 10 games, so they dropped all of 7 points in 10 games. With 8 games to go they think Arsenal can afford to drop another 6 points....wtf.
While obviously possible for Leicester and Spurs to completely collapse, presuming they maintain even half decent form then Arsenal can't really afford to drop any points at all.