It's not really worth going to Kalimdor as a Death Knight.
Normally, I'd completely agree with you. In this case, however, leveling is not really my primary goal at all. I made this DK on a low pop server without CRZ specifically to pet hunt. As part of this, I want/need to be able to get to parts of Kalimdor. It's already paying dividends. One example. I was in Feralas this morning. Ran by the Yeti cave to try upgrade my Stunted Yeti to a rare. On my normal server, I'd be lucky if there was a single spawn. This morning on the DK's server, I had the place to myself, there were at least a dozen spawns, and I was able to do multiple battles before I found the rare.