To me it feels like Germany does actually overprioritize the Soviet Front.(Maybe because it’s so large?)
Last time I played as SU, I was surprised how difficult it was even as a player against AI (note I never play ‘meta’ ) the AI was throwing everything at me, all the tanks it had, all the planes (and all planes thr Axis allies had), yet when Allies landed 20 infantry divisions in Normandy they walked through most of France and Belgium as if there wasn’t a single german unit.
I checked via observe, and there really werent’t almost any, yet in SU I have 5-10 Axis divisions stockpiled in every single province!