I suppose I worded that wrong, but Ostruppen are still the best carriers for squad weapons because they have 6-men with fast and cheap reinforce, as well as low damage per base weapon (less DPS "lost" from army when weapons are picked up), and the cover bonus. All these factors make them the most efficient unit Ostheer has when using squad weapons.
For Ostheer, maybe, but if you have an OKW team mate giving him the weapons is probably for the best considering OKW units tend to get more accuracy from vet than normal units do. Also when recrewing weapons doing it with Ostruppen isn't as good as it used to be anymore since Ostruppen retain their 25% received accuracy when they recrew something.
If you want to recrew a weapon, do it with Sturms who are cheaper and faster to reinforce now and come with some nice received accuracy of .87 natively.