Re: Bar & QR Codes suck for the blind.
I wondered how someone like yourself would get on with a touchscreen device. Basically about as well as I thought: not very well.
About the only thing I could think of to aid usability would be to have a mode where you drag your finger across the screen like a mouse cursor with the vibration motor pulsing as you pass over the border of a UI element, then to "click", you'd lift your finger off momentarily.
Even then, I think it'd be a far inferior UI to what you have now in that "feature phone". A cross between the two is really what is needed. (Maybe buttons on the "case", via a Bluetooth link? Not sure.)