I don't think the issue is connecting to WIFI networks. The issue is when the device comes out of hibernate, it won't automatically reconnect. I have to disable and then re-enable the WIFI adapter to reconnect to my WIFI network.
Base on my search on the net, it appears others have the same issue. Some have resolved it by uninstalling, deleting the driver files, and reinstalling the drivers. What a PITA.
I will say, a $1400 device should not have these kinds of problems. Hope Microsoft resolve them soon.