Given how Putin's opponents often die of defenestration (and get shot ... and get poisoned ... and get in mysterious car accidents ...), Putin receiving a fatal dose of his own medicine would be fitting.
Putin's attacks on power generation facilities will cause the attacks' intended civilian suffering. But as with Germany's Blitz, Putin's attacks will prove to be a dispersion and waste of Russia's hard to replace expensive precision weapons systems. Critical (from Russians' POV) Ukrainian military assets and units are not being hit, and the attacks will strengthen Ukrainian civilian resolve.
With the north bank of the Dnipro nearest Crimea evac'ed by the Russians, it'll be interesting to see whether the Ukrainians try to cross to the south bank for a frontal attack, try a flank attack from farther north, (where the Ukrainians are well established on the east bank of the Dnipro), or simply keep supply lines to the south bank and Crimea under fire (making supplying those Russian forces difficult and deadly).
If using "south bank" and "east bank" for the same side of the Dnipro is confusing, looking at a map that includes Kherson-Luhansk-Kharkiv will explain the usage. Basically, the Ukrainians have liberated their territory as far east as a curved line roughly Kharkiv-Kramatorsk-Zaporizhzhia. That line means the Russian held cities of Mariupol, Berdyansk, and Melitopol could all be attacked from the north, and if the Ukrainians breach the highway connecting those cities, Crimea and the remaining south bank of the Dnipro would almost cut off from supply. Obviously I'm speculating of hypothetical potential based on geography, not knowledge of Ukrainian plans or military experience.
