why aren't we a ray of sunshine ;p
1. What would be the point of a tile when we can easily swipe down from the top of the screen from anywhere? It would be pretty redundant and not very useful In my opinion.
2. I am with you in terms of the breakup of the music hub, but onedrive, onenote, maps, video have always been separate apps. not too much has changed here with the exception of the breakup of the music hub. I for one use EVERY one of those apps on a daily basis, so as for being useful they are not for a great majority of people. You can always unpin them from your start and never open them again.
3. I am with you on the music hub, there are a few apps out there that bring back the original functionality of the music hub. I do like how it does sync my playlists from xbox music on my desktop and tablet though. That feature is very useful for me.
4. photo hub is more direct. If you would like to access your albums open the app and swipe one to the right. Hardly a problem. I do miss the background image though

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5. The alphabetized app list has always been there. It would pop up when you hit I think 25+ apps, it is FAR from useless. Tap on a letter, it pulls up a quick jump list so you can pop around your app list quickly instead of having to scroll your way through all of it.
6. What we have on our phones in regards to Cortana is a portal to the system. There is no way Cortana could fit on our phones in its entirety. The data you feed it gets sent to a server farm, analyzed, an action is created and then sent back to your phone. So when you say "remind me to stop by the store on the way home" It then sends that sound clip out, which then gets translated, an action is decided based on the programing, and a reply is sent back to your phone. If it is location dependent it will ping your GPS to find your location to add to the returned data. Cortana is very highly dependent on locations and how the data is processed. Cortana is not storing your data off your device, it is all on board your phone, only sent when a query is formed. If you don't like it, you can turn it off.
7. Quiet hours is part of the Cortana service, I bet there will be added functionality in the future that allows you to automatically turn on quiet hours when you reach a predetermined location. The service is still in beta, and is not quite all there feature wise yet.
8. Get familiar with Data Sense, it does a really good job at keeping your data usage down. You will not find many smart phones that will NOT use data. Browsing Data Sense, Cortana and other services used very little data during my last months use. And so far this month even less. I have a 4gb data cap, and only use about 700mb-1.5gb of data per month, and that is with some pretty heavy use. IE Pandora on my hour long trips to work / home, constant news browsing etc. In a way some of these services like Cortana is an opt-in, you don't like it. Turn it off, you do not HAVE to use it.
The end of my first day with 8.1...
The notification center is the only change I really like. Though I'm sorely disappointed there's no way to dock the notification center or save a notification tile to the start screen.
The amount of useless apps that now exist (Podcasts, Games, Video, Maps, OneDrive, FM Radio, OneNote) is excessive. There should be an option to remove these!!!!
I also do not like the new Music & Photo hubs at all.
Photo hub: Why launch 'all' my photos? I want an option to display the 8.0 layout; folders.
Music hub: The 8.0 version was better. I have nothing nice to say about the 8.1 version of xbox music.
The layout of the apps section, being alphabetized seems pretty pointless too. I mean, they're already alphabetized.. I don't need the letters displaying there too, it's redundant and takes up screen space.
Cortana - I had high hopes for this, but I'm deeply disappointed location services must be on. I don't want apps saving/transmitting or storing my location data, it's not useful to me. I don't care that Cortana needs it to work, it's just an excuse for me to never use Cortana now.
I also don't like that it's being forced to share data like contacts names with Microsoft. What's the point of that? How is my friends' NAME helpful to Microsoft with bettering Cortana!
Quiet Hours - Needs location services too??? Why! Yet again, another reason I won't be using this function.
Microsoft also didn't consider those of us who have weak data plans. I'm supposed to burn through who knows how much data, so they can improve services and nose around my location data? This should be opt-in, instead of essentially saying "too bad, don't use it if you don't agree".