Jennings certainly offered us some strength in midfield and he could protect the back four. But once McCall got the players in we needed, then we didn't look back from the start of 2013.
I would go as far as to say from the start of 2013 we adopted a we will score more goals than you philosophy and it worked. All out attack, no need for Jenno at the time.
Saying that, next season we won't be blessed with the attacking options we have become accustomed to, and keeping goals out might be very important. There could very well be a role for a Jennings type player.