Certainly Lenin and good compatriots has the best of intentions with their vanguard approach to intention. But, as you noted, that concentration of power ultimately corrupted in the hands of a nefarious few. These ideas were not Lenin's alone and even Marx promoted the idea of a Vanguard long before the Bolshevik revolution, which Bakunin (an early anarchist) was opposed due to the likelihood of the vanguard becoming entrenched within that power. That concentration of power by a class of elite was the mistake. To argue there wasn't time to educate the masses is to ignore the fallout of that approach. These are important lessons to remember, even should the future approach to revolution be focused on the establishment of worker co-ops. Positions of power and power between cooperatives are likely to remain and we will need systems of control to mediate these types of emergent hierarchies.