TonyPro as I read capone had the neuro syphilis that was more dangerous because eat the brain. For sure capone was a sociopath and enjoy ordering murders but was a street guy so I think he was beaten in the rock because the desease starting to stone him.
For the second question capone made to much heat and he was a war boss and after the prohibition the Outfit needed a low key boss; so with capone in Alcatraz and Ness in Cleveland the Outfit men could easly return to made money in the shadow.