Don't have the game yet (still waiting for it to arrive; hurry up!!!) but it's my understanding that although Model D production had been discontinued in 1943, a few probably still fought with various units.
.."A critical oversight that has led to yet another mouthful of poo." . Dirty Jobs with Mike Rowe
Not all are. Some are just PzKw V, such as the Totenkopf and Wiking divisions. It's strange that after Korsun, where they're all Vg (it's early 1944), the Germans have reverted to making Vd.
Or is Korsun quite wrong? I don't know my WWII hardware as well as I should. Oh, I should just shut up.