Quotes from the news wire:
Quraishi was one of the most respected of Baghdadis lieutenants. He continues to carry that respect, but he, of course, does not carry as much weight as Baghdadi, who founded the group and led its sweep throughout the Middle East, sparking the creation of ISIS provinces around the world and a propaganda machine that reaches as far as the shores of Australia and the cities of the United States, while Quraishi is viewed as a more than capable replacement, he is unlikely to overshadow Baghdadis legacy.
Americans in Al-Shabaab fill a variety of different positions, whether it's recruiting, leadership, commandos, suicide bombers, so the opportunity is there to engage in extensive jihad operations. As with other terrorist groups, Al Shabaab uses the Internet to sell its lifestyle online. That gives it a wide reach that extends well beyond the Somali enclave in Minnesota.