Well they did absolutely nothing about American blobs in the same time which do also insane damage. People are just scared that OKW will struggle to keep up against them because OKW doesn't really have much to offer in terms of "combined arms". No medium tanks, no proper MGs (only doctrinal and weak MG34), no cheap mortar, no Snipers. All you have is your own infantry blob that got nerfed, the unreliable leIG (lets see about the buff), the Stuka which you cannot guarantee to hit, the unreliable Flak Halftrack that gets scared off by a single AT gun, and the probably best alternative the Luchs (which will have to be careful against AT still).
Personally I am not awfully scared. OKW still have good doctrinal infantry choices, some squad wipers got nerfed (although if that article on the site about the Greyhound and Motor Howitzer are analyzing the situation correctly it doesn't look like they got really nerfed even). The Raketenwerfer buff was one of the most needed changes for OKW. The problem is they do not seem to do much of what they promise to improve blob counters / punish blobbing, especially not against USF, they only nerfed some OKW units and thus their blobs.
Honestly, OKW has no problem dealing with USF blobs (Kubel handles them well, doctrinal MG-34s). Don't forget, USF player needs muni and fuel to upgrade either LMG or Bazookas thus delaying teching and muni for abilities/nades. The problem with OKW blobs was they were too efficient as Shrek countered medium armor and Obers raped all infantry (no fuel teching + free LMG).
I think we all need to wait and see how the patch really is. I really don't think Ober nerf will hamper OKW as a army. I will pick Falls over Obers as a personal choice.