I think the Ostheer should have additional elite infantry options in the form of call-ins. Gebirgsjäger could be a good addition.
5 men x 4 Kar98s/ x 1 STG.
They would come with the camouflage and the ability to throw grenades as standard? Maybe a weapon upgrade too (Lmg 42 or G43s). In addition they won't suffer penalties for travelling through heavy snow and blizzards.
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I think the ability to ignore heavy snow and move at full speed in blizzard would make the unit very useful. At the same time they can be used on summer maps as well.
Anyway it's just a suggestion. I have a soft spot for Gebirgsjäger's as you can probably see!