I am currently using my nokia n78 yes you heard it right the oldie as my 920 is gone for repairs as I had some issues with it. I have a feature in this phone that I would like to be in 8.1 is that it should auto connect you home wifi when it is available. Even if the wifi is turned off.
we don't need LED for notifications. we got Glance! way better.
Text reflow, or a reader built into the browser that can strip out the text to be read it and scale up in size (like in Safari on iOS) would be greatly needed. In Android I have this as an add on to Mercury Browser (they also have it in iOS).