I am not a military tactician, but it seems to me the generals have gone all in on volume of suppressing fire (kind of like Napoleans volley fire)...as opposed to well aimed effective fire. Training also reflects these tactics, marksmanship training may have suffered to sexual harrasment training. Noise is intimidating, but nothing saps morale faster than your teammates blood. Standard ammo loadout now is still 7 mags, 210 rds...back in the early days of VN, standard load with the M14 was 140 rds (true that most guys schidtcanned 'stuff' to carry more water and ammo). The future conflicts will tell us whether the generals know their schidt or not.
