Bulge '44 Map: Why no Trails?

[FM WarB]

The decision not to have trails on the map was a mistake. Two obvious examples: In the north, trails that were part of 12.SS PD's Rollbahns leading to Krinkelt-Rotherath are not present. In the south, the trail CCR/7th Armored Division used to advance into Bastogne during Patton's relief effort is not there.
This can lead to certain villages not being depicted on the map, though why Losheimergraben in the north is omitted escapes me. Maybe extending a stream too far north to Losheim so a blown bridge could depict the blown railway bridge is the reason this bit of the road net looks off. (A tank ditch would serve the purpose.)