Clichy isn't that bad, and Gibbs will be a very good player soon. A new left back will not be coming in, it won't happen. It will be Clichy or Gibbs next season. Vermaelen returning is massive for next season. Chamakh will be a better understudy for van Persie than he has been recently. Ramsey is another top class option in midfield.
Song needs proper competition for his place, and we badly need another quality option in the wide position. Which would also give us the option of playing Theo through the middle more often.
I'd personally love to revamp other areas of the team, but that's just because of my preference on certain things. I wouldn't say we are desperate anywhere else.