I’m assuming that because he was beloved and seen as a kind ruler, killing him would cause more drama and problems than exiling him.
North gains California as a Free State. ... The South gains the reinforcement of the Fugitive Slave Law, the South gains some money for their debts and they have a chance with New Mexico/Utah states to balance the ratio of slave/free states through popular sovereignty. The Power the South loses due to the Compromise.
When full-scale war erupted between China and Japan..., the Open-Door Policy in China and the Washington Naval Conference agreements.