I have a version 1 in machined and a V2 in Black Oxide. In my opinion, the Blackbird is a razor that has a pretty specific shaving angle, and requires no pressure. If your angle is too steep, or you are putting pressure on the safety bar, you will experience some drag feeling.
After about three shaves with this razor, I had it dialed in, and have never had an issue since. It is the best shaving DE I have ever owned. It gives as close of a shave as I could ever ask for, and is comfortable enough to use daily, even ATG on my neck.
If you are worried about drag, contact Shane and change your order to a polished version. It costs a few more bucks, but from everything I have read, eliminates the issue.