1. Brightness slider ( along with increasing the lowest brightness settings to 2-3 nits as galaxy s5, to be comfy using it at night, or at least give developers the power to create Dimming apps such as Androids "Screen Filter"app)
2. Add an additional 4 scrollable toggles.(Brightness is an important one to be added to Quick Settings, why isnt it available?!!)
3. A Microphone button in the keyboard in order to be able to talk instead of typing in any app(Speech to text) (i.e. in Whatsapp, SMS, Line, etc...)
4. A REAL file manager
5. USB on the Go
6. DOUBLE TAP TO TURN OFF! WE REALLY WAITED FOR THIS ONE U GUYS!!!
7. A slider for the songs to be able to slide to wherever i wanna play! we r in 2014 for God's sake.
8. To be able to keep the phone turned OFF when connected to a charger!!
9. If the access to Notifications wasnt from Top, and instead from the Left or with a gesture like Blackberry's.
Imagine someone with lumia 1520 holding it with one hand and wants to reach all the way to pull down the Action and notification center! Poor guy!