Nope. All edos start out that way. The raikage didn't have any cracks on him before the rasenshuriken hit, then after it hit he both had cracks all over him and regenerative smoke coming off of him. Later he no longer has any cracks since his body fully regenerated.Only damage to edo tensei ninja's is when they begin to regenerate. Ill upload images to end this discussion.
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These three images should keep you quite. Edo ninjas have cracks all over their body and face. Only when they are damaged do they regenerate
Btw naruto's rasengan is stronger, he was in km mode when he used it
Its clear that cracks indicate damage as the place where the rasengan hit the raikage's arm had cracks on it.
and naruto was not in KM mode when his basic rasengan hit raikage's arm, and the power of a rasengan is not determined by what mode you are in, it is only determined by its size. Sage mode merely powers up a normal rasengan by making it bigger.