If I was the Ukrainian president, I would ensure that russia retreats from the ports. If Putin decides to stop there then that is a bad sign for future invasions (a) it blocks trade making Ukraine needing to through russia for trade and (b) russia can quickly bring ship based reinforcements for a second invasion at a later date - pushing down from Belarus, from the east and then from the south on three fronts.
Strategically I would ensure that Russia gives up the ports and the southern cities as part of any neutrality agreement. However I don't trust Putin keeping to any agreement anyway..
Strategically I would ensure that Russia gives up the ports and the southern cities as part of any neutrality agreement. However I don't trust Putin keeping to any agreement anyway..