Usf cannot lay defensive mines. It needs higher survivability.
This is a dumb argument. USF has non-doctrinal mines with the M20 and doctrinal infantry-laid mines.
The reason people are arguing against nerfing the Calliope is in order to deal with Axis blobs, specifically volks-schreck blob. But Axis has at least as big of a problem dealing with blobs. Personally I struggle much more against infantry blobs as OKW than as any other faction because (surprise!) OKW has only a crappy, doctrinal MG. Stuka su Fuss is kind of a kludge, it can work but you have to get at least a little lucky. Luchs is good but will go down quick against 2-3 zooks.
Personally I'm inclined to tone down rocket artillery across the board while giving OKW a non-doctrinal MG and increasing AOE suppression for all MG types. If the point is to punish blobbing, better to do it via suppression rather than a clumsy squad-delete button.