Is there something I can do to get the 5S to display current pace information from the HRM-Run? I see hints about it, but nothing solid. I had a terribly inaccurate run a while back, and generally don't use the current pace field because it's no good unless averaged out over some time.
If I add a foot pod, will I be able to get more accurate results than I get with just my 5S on GPS+GLONASS?
Yes. However, the Garmin foot pod isn't perfect. It varies with pace so once you calibrate it on a track at one pace, it won't necessarily be correct at another. Close enough in most cases and probably even better than most gps cases. Now that I have a Stryd foot pod, I'm getting much better results no matter what pace.