As much as I love jailbreaking, I'd like for them to make stock iOS into something I like to use right out of the box. Without quick compose/reply, I'll suffer through stock iOS whenever it's released on the iPhone Next, but the minute that it's able to be jailbroken I'll be doing it.
Also, no enhancements to the lock screen notifications and no ability to save groups for group emailing/texting is no good for me either.