Ok, well maybe I was a little aggressive in saying it was a "big" organizational need.
Obviously I didn't study each NHL teams depth chart for days before publishing, but at first glance I still think your team's defence is a big weakness in the big picture. I like a lot of the pieces you do have. I like Klinbgerg, obviously. Goligoski is ok. Daley is ok but not getting any younger. In the system a player like Honka is a gem and should be great once he's ready.
On the flip side, I really really really like the Stars group of forwards. While their forward prospect system isn't amazing, their NHL roster of forwards is very good including having a talented but young core.
Looking at who was left at the 12th pick, Werenski was the one guy from the "consensus top 11" still there. Given Dallas needing more potential top pairing defenders it was an easy fit for me. The fact that he's a lefty isn't ideal given the Stars situation, but I still think he makes a lot of sense for you.