You might make sure to go outside after the update, if it's locating off the cell tower, you'll may see our app GPS signal drop more, that's because the integrity of the location is poor, due to no GPS data and only having cell tower triangulation.
After I went outside to get a good SAT lock, my iPhone 6+ is holding 3+ bars inside our house consistently. You might try that. If this continues for you, send bug report from Menu -> About... please.