The Russians had to abandon Kherson because they didn’t have the men to hold on both that front and in Luhansk and were steadily being pushed back on both.
The decision was to abandon the south and redeploy those troops to save the north.
The problem for the Russians is that the Ukrainian armies fighting on the Kherson front are also now freed up. They could also go to Luhansk, or perhaps show up somewhere Russia isn’t expecting.
I think the most likely focus for those Ukrainian troops freed from the Kherson offensive is in Zaporizhzhia, directed south. Ultimate goal would be to sever the main east/west MSR by taking or isolating Melitopol.