Consider that IOTL Stalin misidentified the main attack of the German invasion, which was in Belarus, but he put the majority of his armor in Ukraine. More troops are likely to be pilled into Ukraine and extra troops in Belarus are likely to be just infantry.
Yeah, there won't be any reassessment of German dispositions or the redeployment of the 10th and 4th army to less exposed positions or anything of that nature as part of the Soviets extra preparations.

Again, you seem to think that the only things the Soviets could and would have done was "add more men".
Most of what was left by September was milita and all that was left to mobilize was infantry, you're not putting formations that are able to counter Panzers into the region.
The forces the Soviets had in the Moscow region on the opening of Operation Typhoon consisted of 104 rifle divisions equipped with (in addition to small arms) 11,000+ artillery pieces and mortars as well as 4,000+ AFVs (almost entirely armored cars though, although there is the occasional obsolete T-26 or T-38 in there). And I'm ignoring the 17 tank brigades with another 1,000 AFVs (most of which are actually tanks this time around) and the 61 various artillery regiments outfitted with a little over 1,800 guns of 122mm or more. The only part that was really "militia" about most of these forces was their degree of training.
They break them with assaults and penetrate deep with Panzers, cutting them off and leaving them to wither on the vine.
Ultimately, yes. It's just that doing so will take significantly longer and be more costly, and the Soviets will be better able to launch counterattacks or pull back in response to the breaches. As I said: overrunning positions that are actually manned with people ready to fight is a lot harder then overrunning unmanned positions with their personnel still asleep several miles away.
I already conceded the Germans won't get much passed Smolensk and will do their killing west of Viazma.
And their dying. Not getting much passed Smolensk also doesn't leave them in much of a position to enact the Kiev encirclement, which leaves the Soviets in possession of all their prime industrial regions as well as another million-to-million-and-a-half troops, some of which are their best trained and equipped. This all makes 1942 a very bad year to be a German on the Eastern Front.