There was one sector on the German side of the June 1941 border that gave the Soviets serious problems - East Prussia. It was similar, if not as bad, as Pripet/Polesye, and the Germans had numerous fortified positions that had been theirs for centuries. The Soviets therefore came to the conclusion that the better way to invade would be to repeat the Finnish invasion but with the vast majority of forces in the far north where the terrain was tundra rather than taiga mixed in with marshes and lakes to cut off the iron ore and tungsten supplies to Hitler from Sweden and Petsamo, and in the South to immediately cut off Ploesti and its oil.

It was the failed invasion of Finland and the occupation of Bessarabia/Moldova in 1940 that showed Hitler he was running out of time on those fronts. Losing either Ploesti or the Swedish ore supplies would seriously compromise Germany's ability to wage war (as it did in late 1944 - the Ardennes Offensive with enough oil could conceivably have prolonged the war).

Suvorov also noted several peculiar events at the beginning of the war: (1) the famous "The Motherland Calls!" poster inspiring Soviets to fight was up in major cities in the evening of June 22, 1941, along with a host of other posters that didn't mention anything about an attack on the Soviet Union, just about stopping Germany (showing Red Army soldiers stomping on swastikas or stabbing them with a bayonet) - they had been printed in March 1941, as the printing notes at the bottom of a rare copy the US ambassador had shows, (2) several songs and poems were also printed in the first day or week of the war that don't mention anything about being attacked - the poets in many cases claimed they had composed them in the second half of June but before the war started.

I'm now reading Hoffmann's book on General Vlasov and wondering what would have happened if the Germans in 1941 had framed the war as a war of liberation against the Soviets with the aim of re-establishing some Tsarist or dictatorial power that was anti-communist. Even if the Germans had smashed through to Moscow, the sheer number of troops that would be needed to occupy Russia would have been so great that it would have effectively killed the German economy due to the number of troops in the standing army (not just the direct cost of paying the soldiers, but also the lost people at farms and factories - although slave labor could have supplemented some losses, jobs that required skilled work of any sort would still need free laborers being paid). Given the anti-communist sentiments the Germans initially encountered, had that been capitalized on it is likely the Soviet resistance would have crumbled.