Newer updates seem to indicate that Ukraine is going to be opening a front across the dnipro river. Evacuation of villages and unconfirmed reports of troops gathering in the area seem to indicate that Ukraine may choose to launch some tentative offensive to free the territory in a less costly fashion.
Zelensky can at least evacuate all of Ukraine; it won’t help him take Tokmak before the cold weather, not to mention Melitopol and Berdyansk.