With the supposed fix just released and still rolling out via OTA updates, I would say either
a) Go ahead & pick up the new N7 if the GPS issue was the only thing holding you back, and just be prepared to return it if the update doesn't actually fix the issue (assuming it's a deal-breaker for you)
or
b) Wait several days to hear reports back from folks about whether it seems to truly fix the issue.
Honestly, I bet it will fix the issue, and this few weeks of hiccups will become a blip in our rear view. That tends to be the case with many issues that come up in new versions of Android. Everyone makes a big stink for a few weeks, it's fixed, we all move on.