postponing typhoon till spring and taking winter quarters on the Oka line is the most logically superior alternative to what the germans did in otl that passes the plausibility test (given that Hitler postponed sickle cut numerous times due to concerns about weather; and he himself heard and considered arguments for taking up winter quarters)
the most superior alternative that doesn't pass the plausibility test (from a Hitler and German command perspective, not from a physically possible point of view) is to launch the briansk and vyzama encirclements to disorganize and wreck the soviet western front THEN pull back to the oka line leaving a scortched earth in their wake
Just curious as to why you think it plausible to dig in but not do it mixed with spoiling attacks (if on a lavish scale)?
Michael