Longer battery life. I have a G1. In sleep mode the battery lasts < 10hrs. Days I use it a lot the battery lasts < 6hrs. This make the phone almost useless unless you are able to keep it plugged in.
I want to see more old school/simple phones without all these extras.
My favorite phone was a Nokia from about 6yrs ago. I don't recall the model number, sorry. I had this phone for a year or 2 and put it through more torture than a normal user would think of. I smashed it countless times, dropped it in water several times, threw it out a moving vehicle, ran over it with a pickup truck, hit it with a hammer, and the SOB still worked. Eventually I lost it in a brick wall. Granted, in the end there was no cover, keypad, or screen and the phone only worked in speaker phone mode. That was an incredibly durable, impressive phone.
I would like to see more options to help protect your privacy.