Am in favor of this. If I remember right, there were some "optional rules" published in C3i magazine to retrofit some rules to OPERATION TYPHOON based on BARBAROSSA: ARMY GROUP SOUTH. What I remember most were the HQ activation rules--sorely needed. Very tough for the Germans to pocket the Soviets around Vyazma and Bryansk without that. As much as I love the OCS, I'd rather play this game than GUDERIAN'S BLITZKRIEG 2, mostly because it's soooo much easier/faster to play (if you can believe that!).
I got the original Typhoon (GMT 1995) and would love to play it sometime PBEM, as it is !
I also have "Blitzkrieg in the South" (WWW) and it seems almost the same system, and the precursor of B:AGS.
Weren't the "army paralysis" rules in the newer upgrades too quirky / unplayable ?