There can be no doubt that in 2006 Yas performed above anything we hoped for, so he will always have a place in our hearts. Also, in 2009 he performed well in the shorter formats (as did everyone) and 2010 did a good job in Div 2 of the CC.
However, since 2007 he hasn't exactly been a matchwinner with the ball in England, with only four 5fers (two of those in Div 2) and completely misfired in the 2009 CC, the second time he had been part of a relegation side.
It is understandable that Robbo would want to check the availability of others, whilst not closing the door on Yas. In fact, it would be neglect if the manager of a professional sports team didn't look for better than he already had. '09 taught us that bowling was the key to avoiding relegation, not that we didn't know it, and Rana gives more there whilst losing not too much with the bat.