The downside of Zhukov's preference for overpowering frontal attacks. The Germans built a very powerful defensive line there, Zhukov overdid his artillery and misused searchlights, this contributed to the clusterfuck that happened there. The difference between that and Konev's simultaneous attack shows that didn't exactly need to happen. And that the attack on Seelow Heights happened as it did was because Zhukov's nerves failed him for the only time in the war.
Zhukov's strategies obviously did work given the USSR was in Berlin and the Germans didn't get to kill all Europe's Slavs and turn Moscow into an artificial lake. They did, however, lead to the instances like this and at the Battle of the Okha Line where the frontal attacks produced heavier casualties than maneuver might have.
TL;DR: They wanted it thus, this did not mean they always got what they wanted.
All's good..."pulling your chain" a bit
Have you read the work I cited?
Well worth the price of admission...Germany was fubar