The first couple of versions of the NRC watch app kind of worked that way, and was much more stable because of it.
I hadn't heard of that app until now. I've tried many others, but it's been difficult to let go of Nike+, mostly because I've used it for 10 years.
I haven't been using Nike for as long as you ... only about 6 years. Started with my first iPod nano with the footpad and now I'm on NRC with the AW-S2. So I too understand the reluctance to leave and lose all of that data.
Fortunately, there are ways to get the data from Nike's servers and onto platforms that are more liberal with it. About a year ago, I imported all of my Nike data onto Smashrun.com. It offered a better way to visualize my data. I was still using Nike, but the website sucked and was super slow. Only recently, Nike broke the API that allowed Smashrun to obtain the Nike data, so I set off to research my options.
I've found two apps that will help me liberate my data from Nike, but I won't lose all of my Nike progress.
1. RunGap can somehow still obtain data from Nike. I don't know how it's broken for SmashRun, but works for RunGap. I have a theory, but it's more of a guess. And it's irrelevant anyway. I use RunGap after every run to obtain the Nike data and then share it to SmashRun. Everything except elevation comes over. I did pay $2 for a 3-month subscription to their "Swag-Bag" which allows for more export options, however, you can get the data without paying. The $2 allowed me to share with SmashRun more easily.
2. While I haven't yet bought iSmoothRun ($5), I have done a bunch of research on it. It has an iPhone app as well as a stand-alone AW app. Supposedly, it grabs more data than NRC (cadence, etc.) and can automatically share your runs with SmashRun and NRC as well. For me, this is key. I think my process flow would be as follows.
a. Run using the iSR iPhone app ... hopefully, the AW app will allow me to keep the iphone in the pocket while I can see my time/distance on the AW.
b. Finish the run and share the data to SmashRun and NRC.
This will allow me to keep progressing my NRC goals and badges. Still on Blue.
Anyways, that's my exit plan for Nike ... although it's not a total exit.