In answer to your question, we do have a more up to date dataset. There is a two week sample of station entry and exit volumes, bus boardings (by stop and route), and number of journeys between station pairs (including journey time between the two stations) from October 2015 available as open data.
For more information, please read the following blog post over on TfL’s Digital Blog, where you will find a link to the dataset and a description of the contents: https://blog.tfl.gov.uk/2015/12/09/is-customer-flow-data-useful-to-developers/.
I hope this helps. Let us know what you think of the data - we are always keen to refine and improve our datasets based on feedback from the open data community.