Four things the next iOS update must have
[2] "Child Mode": Probably an extension of the above. Allow me to setup a sandbox of apps that my child has access to. This sandbox should also allow for disabling such things as in-app purchases, app store access, multi-touch gestures and more.
[3] Fax Mode: My phone should be able to receive and display faxes. I want my phone to recognize a fax signal, receive the fax and turn it into a PDF. It should email me that PDF or store it locally. I should be able to pick-up the phone and, if I hear a fax warble touch a "Receive Fax" button.
I'd write an app to do this except that Apple does not give developers access to the phone in any meaningful way. Lots of interesting apps could surface if developers had access to phone call events.
[4] Provide access to the serial port on the 30 pin connector without the restriction of having to be a MFi member and all that comes with it. Sell an approved 30-pin to RS232/422 cable that will work with any app written using the relevant API.
I understand the desire to control the sandbox, but I think that this has gone too far in some areas. Not providing access to a basic I/O port for serial communications is a little over the top.
Of course, the list could be much longer.