don't have the time to read through every page and reply, but from what i did read, you guys and i all share pretty much the same complaints.
i have two main problems though.
1. the de- integration of Facebook.
I use the message hub to facebook IM all of my contacts, besides my facebook group chats, which for some reason don't work (yet group sms works, but no thanks)
earlier today i was on a time constraint and desperately needed to contact someone. i don't have that persons phone number, but i do message them on facebook all the time.
I open the message hub, go to their name, and to my surprise, " Read-Only Message" appeared above my text box. i couldnt reply right from there. mind you, this is someone i contacted through the message hub just a few days ago using facebook chat. this left me standing confused for a good 2 minutes, before i had to open the facebook app, which takes FOREVER to load up, switch to the message tab wait for THAT to refresh for some reason, then start up my message. by then i didnt even need to talk to said person any more. in that time i couldd have messaged this person how i normally do, and would have gotten my reply back. that was horrible.
on top of that, everyone whose numbers i DO have, i talk to through facebook chat anyway, because most of the time they are on their computers, while im on my phone. i have no interest in my news feed most times, just messaging. my closest friends, i cant facebook message them through the message hub anymore. i have their numbers, but windows phone 8.1 sends an sms in reply, not an IM. huge deal breaker for me. but hey, im stuck with it now, right? Sure, i can use Facebook's Messenger app but the point of integration, is so i dont have to. that app had issues i wasnt too happy with, that i uninstalled it. now i HAVE to use it, because the main app is just so dang slow.
2. Xbox Music
someone pointed out that the tile is no longer live, which i didnt notice, but not it hurts that i know. i put so much work into organizing my music files just to see the band on the live tile, and thats gone. besides that, when im listening to music, i can no longer swipe to skip the song. that is the most aggrivating thing ever. and the currently playing track isnt in its own tab anymore, but rather its on page on the main music screen. which, actually in retrospect, is great. but when im walking, phone in hand, with the screen and music app purposely on and open, i like to skip songs by swiping my fingers, without having to watch my screen and be distracted. now i have to press the tiny skip button. I'll get over that. but i still wont get over how they managed to turn a pretty mediocre music app into a worse one. the only thing stopping my from using 3rd party is because somehow those are even worse.
and please Microsoft, PLEASE, for the love of everything good and sacred in this world, give us Gapless Playback. I havent had an iPod since '10, but from then on, i had other devices with gapless playback, and ever since switching to my lumia, its the only thing i miss. i listen to TOO much music that needs it.