Will New rotations improve CAF?

I am an AUA graduate of Sep, 2013. last rotation was in July, 2012.

I will be going through 2014-2015 Match: my Step scores are average, I'm not US citizen, therefore I need to improve my CAF (Common Application Form).

I feel I need more recent rotations/LORs in the speciatly I'm applying to, so I'm thinking about doing more clinical rotations. I can schedule them through AmeriClerkships or through Jackson Park Hospital in Chicago (where I did my previous rotations).

Just wanted your opinion on it - is it worth doing? It costs quite a lot ($200-500 per week depending on rotation plus insurance).

Thanks.