I can image the glacier slowness of calculating all that information at every step. But I guess if you are with good friends, the game is just as fun fast or slow.
By Korsun Pocket, I meant the Wild Bill campaign for Steel Panthers, but I also like the SSG Korsun too but Normandy and Italy are lot better I think cause of complex terrain.
I think the SSG games were even more complex than this Lock n Load style especially Normandy and Italy because before moving any units or doing attacks, I had to allocate units and arty & air support to each attack in advance so I didn't overload on the first or second attack which makes the other attacks too weak. I also had to consider the effect of cratering roads so sometimes had to hold off on using arty, and then the biggest problem of putting units on defensive terrain after attacking to avoid being wiped out in counterattacks. And allocating units was fun cause it is good to have reserves, and a reinforcement division could sneak up to a random part of the line and surprise the enemy with a sudden strong attack at that point. If I made a hole in the enemy line, had to think was it worth it to rush in a fast unit like a recon armored car to destroy arty and supply trucks cause the unit I send will be destroyed by a counterattack which can be a terrible loss to a division. The are only a small number of objectives so it is important to make a long-term plan. In Italy it was fun to set up ambushes on roads that the allied player expects to be undefended and then swoop in suddenly and wipe out enemy units and then move further up the road on defensible terrain to avoid an angry counterattack. The Salerno, Sicily and Overlord battles got quite complex cause of terrain and supply problems on the mountain roads. Germany has lots of nice defensible terrain in Italy but is low on units and is very vulnerable to supply being cut off on those mountain roads but can sure do a lot of damage to the allies if used carefully. Those are the only games I played PBEM games a lot with.
The game that I like the most is Normandy, although Italy is also very good.
However, a good game does not mean it is convincing. All those games are good, some very good, but none convinced me.
I think the problem for game designers on this scale is to correctly reproduce the tactical complexity of the units at the battalion level and, at the same time, introduce strategic aspects for the regimental and/or division commanders.
The Longest Day:
The game that I have seen that comes closest to this that I am explaining to you is a boardgame, published years ago by The Avalon Hill Game Company. His name, how could it be otherwise, is The Longest Day. The game does not only cover the landing of Normandy, because on this scale it is difficult to enter into the detail of the landing. However, the organization of each division, with its battalions, its zones of influence, the artillery support of each division or regiment, were very convincing. The problem is that it is a macro boardgame. Very complex to manage, even if you have good friends with you that help you have a good time ......