I didn't play enough yet to really make safe statements, but judging from my experience so far I don't see why they would nerf the OKW Flak Halftrack and leave the American one alone, the American seemed to be superior.
what they should have done is increase it to 60 fuel instead of nerfing it
What I have found strange, however, is that a friend of mine who was still below level 50 also has a prestige star, yet his levels have continued normally.
for some reason I was not getting all the resources expected from my opel blitz' trucks on La Gleize. The sector was not shaded in at all to denote extra resource income from that sector.
note the two western most sections do not provide bonus resources. Is this a map specific bug or a new opel blitz bug??