It also seems to me that Para's advance was a bit faster than what the Wehrmacht historically achieved, so not only did he hurt the Soviets in this game even more and preserved his own forces better, the more rapid advance should have eventually prevented the relocation of some more of the industrial capacity of the Soviets than what historically fell into German hands.
Having watched a nice documentary on Barbarossa yesterday, Para is only a wee bit ahead of the positions the Wehrmacht could have held, if Hitler hadn't stopped it multiple times.
Capturing Leningrad was definately an option, but the GröFAZ didn't want to supply millions of civilians over the course of a winter and preferred besieging and starving them.
And considering that advance units got to a point 20kms away from the Kremlin with
a longer R&R break, capturing Moscow *was* an option indeed!
Heck, even the real Wehrmacht got kicked out of Rostov after capturing it!
Para saved valuable time by e.g. pincering his way around a soviet army before capturing Kiev or making the Leningrad pocket larger than it was in reality (and thus not having to struggle his way into and out of Schlüsselburg).
All in all, I'm amazed how plausible Paras playthrough is (+/-5%). It really depicts how Barbarossa could have been without all the "yes/no, stop/advance" from above...