Pienaar is gash, no pace, has the odd great game and many many awful or at best average games inbetween.
As OMS said, having Bale stick by and large on the left wing and having some semblance of an actual real formation was the biggest change, though they still looked dodgy in parts and Ekotto was stupidly lucky not to be sent off considering his two footed tackle was feet from the linesman(and obvious to anyone with working eyes anyway). Bale is not a capable freerole player, much more dangerously, he THINKS he is and when he's been allowed to drift all over he tries tricks he isn't capable of, shots he won't ever score and hogs the ball when there are far far better options.
But as always the thing is your own team mates need some level of predictability, if you hog the ball and pass or cross at daft times your team mates have no chance of making runs at the right time or being in the right place. The whole team has been out of form for a while now, if they can stick to a formation and everyone in the same position for a while there isn't a good reason they can't get right back to form.
Next weekend doesn't look great, Arsenal against City, Newcastle against Swansea, Chelsea vs Wigan and Spurs vs Sunderland, I can see Chelsea and Newcastle both being 2 points behind Arsenal come the end of next weekend, and Spurs.... at best they'll be level , they'll probably lose by a smaller margin than we will and we'll be behind on goal difference, at worst they'll move 3 points ahead of us.
Anyone who thinks Arsenal are certain for top four is deluded at this point, Newcastle have the most inform attack, a ridiculously good defence considering who is in it, Chelsea are improving and Arsenal can suck in any position in any game whenever they want
EDIT:- another weekend where Bendtner and Vela score, while we had Gervinho and Chamakh, who cost 12mil and roughly 140k a week between them........ absolute madness they haven't been able to get games, both having very good seasons when finally given a shot and both looked very very good for us if and when they were given chances.