Never mind my last post, looks like Azov are getting ready to surrender. At least according to their twitter page.
I think the Russian plan will be to annex the whole of the Ukraine. What's happening in Kherson is an idea for what will happen to the rest of the country.
Full annexation of Kherson by Russia has several implications both currently and postwar.
1. They control the Dnieper delta. Currently that means there is no longer the possibility of resupplying Ukrainian forces by sea. After the war it means they control all seaborne trade from interior Ukraine.
2. As a federal subject of Russia it enjoys full military protection in all ways. The implication is that Russia is capable of providing this protection.
3. It secures a beachhead on the west bank of the Dnieper and is a logistics hub for launching further raiding attacks into the bulk of Ukraine.