if you looked at the game on saturday, the problem was that song was overrun.
there was a moment in the first half where he took the ball off koscielny (i think), and cut outside. no movement ahead. so he cut inside. still no movement.
arteta was wandering about somewhere to his left surrounded by two lfc players, rosicky was ambling about in the center circle, rvp was surrounded, and benayoun and walcott were doing their best imitations of lampposts on either wing.
song was only a few yards out of the arse box, and so playing it back was not a good option. which meant that short of deciding to dribble the length of the field and trying for a bit of roy of the rovers glory, he was on a hiding to nothing.
as it was, he held onto possession for a while longer, and moved the ball a little further forward, before the attentions of the several surrounding lfc players forced him into a pass that was marginal, but at least moved the ball to a position that was less dangerous.
variations on this theme were happening time and time again. if arteta looked less bad than song, it was because at least song's movement was giving arteta an out, whereas the reverse was rarely true.
so while i agree that song's job is to not to give up possession through poor passing decisions or being dispossessed, when the movement of your teammates is poor, you often have no passing options (benayoun and walcott were appalling in their inability to come inside when needed, and arteta was frighteningly lightweight on saturday), and if you are being overrun in midfield (which we were, because benayoun and walcott were essentially somewhat pointless passengers in the first half) then no matter how hard you try, unless you stick the ball in your shorts and run into the stands, sometimes you are going to end up getting dispossessed.
all of this is why things improved considerably when arteta went off: diaby (and then after he blew up, the ox) provided more movement than arteta had been managing, and someone or something managed to pursuade benayoun and walcott to spectate a little less and make themselves available. not long after arteta went off, there was a period where the arse kept the ball for maybe 20-30 passes -- they never once looked capable of anything close to that in the first half.
what i liked about song's play on saturday was that he kept doing what he could. despite the useless way the team were organized / playing in the first half, he kept making himself available. in an overrun midfield, doing this can often end up making an individual player look worse than someone who hides ("oh look, i'm marked! don't pass to me!" -- and since you mention de rossi, i've seen him do the hide, pout and point more than once). i suspect you'd say that song had a better second half than first half; as you've probably guessed by now, i didn't think so. the only difference was the way the people around him played and moved in either half (and actually, i think song looked pretty fucked after around 60 mins or so on saturday, but he kept on going well).
like i said, in the circs, i thought song did very well on saturday. i dunno about walcott. he clearly can't do what he was asked to do against liverpool. but insipid as he was, i don't think he was as awful as benayoun (as far as i could see, his only contribution was to make gibbs feel like he was playing less well than he was). walcott at least made some space for sagna, who had some good moments.
fb.