That's what the Assault Officer is for, now.
No, that's what he was supposed to do.
And going by how often its used in competitive games, I'd say he doesn't carry that job particularly well.
Actually OST engi does carry CQC for OST for core troops, it's not like assgrens are in every commander. If you say PG's they are somewhere between there for OST for mid-CQC.
If you think pios are CQC for ost, you need to re-evaluate your life choices, because somewhere down the line you've made a terrible mistake.
Argue all you want, its PGs role and just because they still are effective beyond 10 range does not change that fact.