Don't know about any of those issues any of you guys are experiencing as I'm using an unlocked refurbished at&t L920 on 10586.107 and I've never had any of those issues. What I do experience is whenever the phone has to restart for any reason e.g. build installs or manual restart it loses assigned ringtones to 1/2 apps and that's it. I've noticed a considerable battery non-drainage since the w10m build from .29 - 107 and with that I'm pleasantly surprised for that given the old hardware in use. What I want is another build or two before the definitive release to the general public and I'm good to go. When that happens I believe that it will be a very stable and very accepted OS and after that what we'll be getting will be the "features" that we look for with each new build we get.
Stop crying and accept you're just as stupid as MS to go buy a phone just released (L950/XL) with an obviously unfinished OS that wasn't even released to past devices from the L920-L830 and you're bitchin about it, smh. You forced MS hand and that's what you got and now they're trying to fix that and give you what we WP users deserve. I'm honestly pleased with what I'm using currently and it's my daily driver and I'm not sorry one bit and EVERYTHING is turned on in the background and I can leave my phone overnight at 100% charge and get up in the morning and find it in the 90s and that's a L920.
Bring back my half screen contact pic when calling or receiving, gestures - loved not having to touch my phone screen to answer a call just pick and place to my ear, more actionable notifications, for god's sake take out those blank circular tiles in the people hub, they ruin the beauty of my start screen.
Each build is to improve what was in the last to create a more stable usable OS for public release, so far only a select group have had issues but the majority have had favorable experiences and look forward to more. MS continue to improve the OS and I look forward to the final release build and from there the features to be added to it and so and so forth.