Not in my case. I have had the new maps listed for a while now (not in a rush to update). There was no sign of the GPS update (on my GE) until yesterday where it showed up as an additional update available (along with the maps). Installed it by itself without a problem. Restarted the watch and ran an activity as I was driving to training (although it did not actually take long to get the initial lock). As the release notes are really vague, I have no idea what, if any, improvements could be expected.