isonic 2012

got the chance to see the IS 2012 brochure.
Main datas seem the same as 2011.Basically you've narrowed the tail section (0-30 cm),thinned the nose rails,reshaped the cut outs.
In the 117w you've introduced the heel-extension:what's for? Did you need more power for very light wind or what?Also this board is 0,5 wider mantaining the o.f.o. the same than 2011.Still:why?
In the end:what we are going to buy with 2012 IS ?

thx