My take:
Quick toggles - If Apple includes this, it will only be because of the public pressure. Quick toggles are counter to Apple's overall UX goals.
Quick close in task switcher - I feel the same way about this as I do to quick toggles. Be thankful you can close them at all.
Clear all notifications - Likely, though they didn't add it to iOS 6. Will probably happen at some point I'd guess.
Infinite folders - Likely. Would love it to be able to shove everything in a folder, but that's not really a solution to the problem of app icons.
Hide or put newsstand in a folder - I'm guessing newsstand gets a complete redesign. The main reason it can't go on a folder is because it is just a folder. I'm guessing it gets redesigned to be a launchable app instead of a folder that holds individual paper apps. That should solve the problem of tucking it away.
Adding more features to the lock screen - ehhh, I'm not too sure how valuable this is to the general public. Especially since you can open apps that sent you notifications directly. A love weather widget would be nice, if you could plug in your weather app of choice and not just the default Apple one. Being able to choose what the swipe up is would be nice, but basically anything other than a camera breaks the UX when a device pass code is enforced, IMO. You're not going to let people swipe up and make a phone call or check email or send a text without punching in the pass code and, IMO, having the camera be accessible makes the most sense.
Change default apps - Good god I hope so. I do think that if this is allowed to happen that it won't be open to any application someone throws on the store. I think those apps will be heavily vetted by Apple.
Upper/lowercase on the keyboard - You know, I had never thought about this until we started rolling out iPhones and Android devices at work and got questions from the new iPhone users as to how to tell if they're typing a capital. It had just never occurred to me. In all honesty, I like the all caps keyboard, mainly because I think capital letters look better than lower case letters overall, but that's just me. The bottom line here, however, is that Apple has had plenty of time to consider and implement that change. They haven't done it thus far, which isn't to say that they won't ever do it, but I imagine its been considered since at least iOS 3. Flip a coin on this one.