Well, I see eyour points guys. Penalty should be given during the race and never after... but it was clearly a mistake from the stewards and Force India for not claim against that maneouver. There was very interesting for them if Raikkonen gets penalized.
No one should overtake using "non circuit surfaces" so as Richard says, something should be added in all the tarmac run offs, something to damage the car in the case you use the runoff to speed up and rejoin in a better position, as gravel or high Kerbs.
In the particular case of La Source, I can understand there is some tarmac in the same direction the start finish line straight comes, outside of La Source corner, because maybe someone can miss the breaking point... but why they added tarmac in the exterior part of the downhill to Eaur Rouge??? Can´t see the point on it.