>>521104585
One factor is that the depth of the "rear areas" has stretched far beyond what was usual before. You simply cannot have large numbers drawing attention within range of enemy recon and artillery. Real Reporter had a guy on his channel that explained how medevacs can last for days now and troops get issued antibiotics to not die from minor wounds before they get medevaced.

>>521104609
You said there were 6-10 brigades IN the pocket, not the sector.