This. Historically, the .50 would shred infantry and slice up light armor. Relic should have made it as you said, or the M1917. Still cheeses me Relic makes the MG42 with 7.62mm (with AP) to kill light armor, but the .50 (12.7mm for EU folk) doesn't do squat in this game.
But DShKa... DShKa is 12.7 too! Can we discuss its problems here too, or we will continue to talk about capitalistic machineguns and pretend like DShKa never existed in CoH2?