The ability to save only High Resolution .JPG, and to be able to auto-upload to Onedrive. Currently, there is only an option (on Lumia Icon) to save 5mp, 5mp + 16mp, and 5mp + 16mp DNG. I would like to save only the 16mp file, whether DNG, or JPG, and have that file auto-upload to Onedrive. I have unlimited data, and should be able to do what I want with my image files. It is super annoying to have to go and delete all the 5mp files, because, I literally have no use for them.
Notification Center - Yes, the live tiles give me notifications, but if something buzzes my phone, id like a shortcut to access that.
I am intrigued by Cortana - I hated Google now (mostly because it was slow, and crashed my phone), and I have never used Siri. Im excited to see how it works, what it does, and if I will actually use it.