The free agent market is pretty much dead right now, and there are still 9 UFA RHD available who played at least 15 minutes night last season. Five of them are comparable to TVR as 6/7th defensemen who can chip in on the PK (Bowey, Stone, Holzer, Rutta, and Goloubef). There are gonna be starting caliber D settling for tryout contracts. TVR's better than the typical #7, I'm not disputing that, but I really don't see what's so special about him that he could demand guaranteed playing time in a market like this. Also, the Caps obviously know that Schultz is a major injury risk at this point. It makes sense to keep Jensen around and add TVR as a contingency plan.
As for LaDue, again, this is a guy who played 25 minutes last season. The Kings apparently weren't all that impressed by his xGF%. He seems like the new Aaron Ness, the guy who'll be 9th on the depth chart and run Hershey's power play.