My argument isn't that OKW doesn't need any map control at all. I just think they need less than other factions. Munitions in particular just isn't that important for them after a certain point because of obersoldaten. You even say so yourself. Every other faction has to spend either munitions or fuel to be able to compete vs infantry the way they do.
Of course if you take and hold the whole map and then steamroll your opponent with tanks before he's ready you'll win, OKW isn't THAT OP
okw still needs to maintain map control in the early game because, as i mentioned, losing fuel/excessive territories means your luchs/obers dont come out in a timely manner, and further sets behind the panther. munitions are very important in the early game, and you basically need to spend them on shreks at every oppurtunity. the shrek en masse is probably the most effective armor deterrent that the OKW have. the jagdpanzer severely hamstrings your teching capabilities, and the raketen has a terrible aimtime. if you want to counter m3a1s, m20s, and early medium armor, you have to rely on the shrek. otherwise you risk getting completely dominated. i only have an excess of munitions in the midlate to late game, but then again most factions do, and there are late game artillery to call in and mines to lay
im not arguing against more muni dumps for OKW, i've suggested them for awhile now. however the idea that the OKW can just hole up in a small sector of the map while you cap the rest and still win most of the time, is wrong. in most maps the munitions and fuel points are fairly far apart, so if they choose to just hole up you should be able to take one of their vital points