I usually don't really like comparing players, but Karg is a perfect fit for German NT right now. Furst attacks much better as slide-attacker like her role in Vakifbank and Karg usually plays in front of her setter, plus she's a better blocker than Susschke.
If Guidetti discovers another talented young OH aside Geerties (No Brinker No Beier...), German NT may have much more chances to be a better team this year. The other positions look pretty consistent, especially with Kozuch's current form and Apitz as starter