Cosmonauts Alexei Leonov and Yuri Gagarin held Vasily Mishin responsible for the mechanical problems and delays of the Soyuz spacecraft and the death of Cosmonaut Vladmir Komarov in the multiple failures and then crash of Soyuz 1 on April 24, 1967. They were convinced that the accident would have never happened if Korolev was still alive. Colonel General Kamanin the commander of the Soviet cosmonauts didn't like Mishin either.
Alexei Leonov was convinced that if Korolev had lived the Soviet Union would have beaten the United States to the moon: both the circumlunar navigation mission and the manned landing.
Some believe, such as Brian Harvey in his book Soviet and Russian Lunar Exploration, that Korolev would have been more successful in getting the N-1 to work properly despite the complex arrangement of the 30 Kuznetzov engines in the first stage and that Korolev was a much better manager than Vasily Mishin. They believe that Korolev would have been better handling the clashes with Vladmir Chelomei and Valentin Glushko and maintaining support for the N-1 project. Perhaps Korolev could have stopped development of Chelomei's rival lunar landing project using the UR-700 and then the UR-700M and the UR-900 for a manned Mars encounter (flyby). Others believe that the N-1 was too complicated because it required complex piping to feed fuel to 30 engines and was therefore fatally flawed and would never have been made to work properly and/or Soviet industry had quality control problems that prevent them from manufacturing complex rockets.
If the N-1 had worked successfully as scheduled, the Soviet Union could have launched larger space stations in the Almaz/Salyut project and a Mars soil sample return mission. There was also plans to use the N-1 for a manned flyby of the planet Mars, in fact the launch vehicle was first designed to support a Mars flyby mission before the decision was made to go to the moon.
Perhaps TsKBEM would not have been merged with Glushko's KBEM to create NPO Energiya in 1974 or a descendant of the RLA family of rockets would never have been used to create the Energiya booster used to launch the Buran space shuttle.