Next year there are no changes to the regulations regarding exhaust position, so we can expect teams develop their new cars with coanda set up in mind from their very inception. This will mean the entire sidepod and its internals being repositioned to create the ideal downwash and the tail end of the car rearranged to allow for the bulged exhaust fairing and slim coke bottle shape.
http://scarbsf1.com/blog1/2012/10/15/analysis-coanda-exhausts/