I should add, the worst annoying problem I've had have been poor BlueTooth performance. But to be fair it's gotten a lot better over time and I think at least part of the issue is my hardware, not the software.
There was also a foollshly planned roll out of their actually pretty cool Advanced Privacy features: when they first push the update it was all turned on by default, including the spoofing of location and IP address, which made loads of apps (like maps, both others too) just not work because they were being blocked by the new Advanced Privacy features.
Again for usability, I actually turn quite a few of their Advanced Privacy features off because too many things just don't work if you have them on (e.g. unfortunately for one of my contracts with a Charity I do some work for I need to use Outlook and it just wasn't working because all M$ servers were automatically being blocked - but it was OK once I whitelisted the necessary ones).