I have the same experience as OP. I am using a 930 and it's a crippled device filled with bugs, lag, resume screens and crashes! I love WP8.1 but this is far from it. Tried resetting The phone 2 times and it usually work good the first days but then just becomes the same mess. I don't enjoy using the phone anymore
Some issues I have:
- Phone resetting about 3 times per week on average.
- Rich capture camera contains artifacts (about 3 red lines on the final picture) which makes it useless.
- Soooo slow. WP8.1 was just a lot faster.
- Battery life is basically down to recharge twice every day and the phone can sometimes get very hot without getting cold again for a long time (without doing anything).
- Can't use speaker mode for calls.
- Audio recording doesn't work.
- Edge crashes everytime I try to Google (from the url field) using multiple words (searching for "cat" works but "mad cat" will crash the browser).
- The previously opened app is often gone from the "opened apps" window.
- (Not really WM fault) Spotify app is so bad I will soon go mad.
- DON'T remind me that the audio level can damage my hearing for the 100000th time.
Except for Spotify app and Audio level notifications none of the others existed when using WP8.1. The speaker mode for calls and being able to record audio stopped to work the second I upgraded.
And maybe this seems strange, but somehow the "fun" is gone. Previously I had no issue with the "app gap" because the OS was such a joy to use. The home screen was a mini-game by itself and everything was so fast, smooth, beautiful, snappy and just transitioned in a nice way. Now it really feels like a desktop OS somehow.
I do believe they can get WM10 on the right path again, but I will wait for that. Android is finally good enough to use for me and therefore I will be using that until I hear more satisfaction from WM. Lumia 1020 is such a good memory and I think that will be my favorite phone experience for a long long time.
I should also say that on my Surface computer Windows 10 is a pure bliss to use. Love it!