Speaking for myself, I liked Ludwig's game better than both CDH and Kylington. He's capable of playing more the JMFJ/Manson style of Defense to compliment whoever the "offensive-minded" D guy is going to be. Having said that, I thought John was looking hungry in the offensive zone too, him going hard after a rebound just to the right of the net really caught my eye.
Certainly hope he's back in the lineup soon as I'd like to see if he can truly handle third pair minutes. He's the only one of the bunch I'd really trust to start learning the PK as well.