The performance is what was frustrating more than the result. But it is a bad result actually, Newcastle is a lower ten club, if you can't beat them away, then who are you going to beat?
Also this is the first time i ever see Wenger making defensive substitutions when he's not winning. Frimpong for Rosicky and Djourou for Ramsey showed that Wenger knows his team aren't good enough for Newcastle and that he's content with a draw.