I appreciate your input, but the shifter feel isn't too far off from that of the hardtail that the Rohloff wheel has been on for the last few years. The only other option for cable routing would have been along the top tube, and I'd have had to either set up the cables with a similar S-bend to accommodate the top linkage movement, or I'd have had to allow the cables to slide back and forth along the frame, neither of which I was interested in.
Also, regarding the upward-facing inputs on the shifter box, I ran the cables on the last several hardtail frames facing up like this, and never had any problems. As a matter of fact, I'm still running the same cables I initially installed when I put the hub on in 2007.